Gizmos for West Virginia - Mathematics: Geometry (College- and Career-Readiness Standards adopted 2015)

This correlation lists the recommended Gizmos for this state's curriculum standards. Click any Gizmo title below for more information.

CPC: : Congruence, Proof and Constructions

1.1: : Experiment with transformations in the plane.

CPC.M.GHS.1: : Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

CPC.M.GHS.2: : Represent transformations in the plane using, for example, transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).

CPC.M.GHS.3: : Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself.

CPC.M.GHS.4: : Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.

CPC.M.GHS.5: : Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, for example, graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.

1.2: : Understand congruence in terms of rigid motions.

CPC.M.GHS.6: : Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.

1.3: : Prove geometric theorems.

CPC.M.GHS.9: : Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints.

CPC.M.GHS.10: : Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

CPC.M.GHS.11: : Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals.

1.4: : Make geometric constructions.

CPC.M.GHS.12: : Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.

SPT: : Similarity, Proof, and Trigonometry

2.1: : Understand similarity in terms of similarity transformations.

SPT.M.GHS.14: : Verify experimentally the properties of dilations given by a center and a scale factor.

SPT.M.GHS.14.a: : A dilation takes a line not passing through the center of the dilation to a parallel line, and leaves a line passing through the center unchanged.

SPT.M.GHS.14.b: : The dilation of a line segment is longer or shorter in the ratio given by the scale factor.

SPT.M.GHS.15: : Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

SPT.M.GHS.16: : Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.

2.2: : Prove theorems involving similarity.

SPT.M.GHS.17: : Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity.

SPT.M.GHS.18: : Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

2.3: : Define trigonometric ratios and solve problems involving right triangles.

SPT.M.GHS.19: : Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.

SPT.M.GHS.20: : Explain and use the relationship between the sine and cosine of complementary angles.

SPT.M.GHS.21: : Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

ETD: : Extending to Three Dimensions

3.1: : Explain volume formulas and use them to solve problems.

ETD.M.GHS.25: : Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone. Use dissection arguments, Cavalieri’s principle, and informal limit arguments.

ETD.M.GHS.26: : Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems.

3.2: : Visualize the relation between two dimensional and three-dimensional objects.

ETD.M.GHS.27: : Identify the shapes of two-dimensional cross-sections of three-dimensional objects, and identify three-dimensional objects generated by rotations of two-dimensional objects.

CAG: : Connecting Algebra and Geometry Through Coordinates

4.1: : Use coordinates to prove simple geometric theorems algebraically.

CAG.M.GHS.29: : Use coordinates to prove simple geometric theorems algebraically. (e.g., Prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, square root of 3) lies on the circle centered at the origin and containing the point (0, 2).

CAG.M.GHS.32: : Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula. This standard provides practice with the distance formula and its connection with the Pythagorean theorem.

4.2: : Translate between the geometric description and the equation for a conic section.

CAG.M.GHS.33: : Derive the equation of a parabola given a focus and directrix.

CWC: : Circles With and Without Coordinates

5.1: : Understand and apply theorems about circles.

CWC.M.GHS.35: : Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle.

CWC.M.GHS.36: : Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle.

5.2: : Find arc lengths and areas of sectors of circles.

CWC.M.GHS.38: : Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.

5.3: : Translate between the geometric description and the equation for a conic section.

CWC.M.GHS.39: : Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given by an equation.

5.4: : Use coordinates to prove simple geometric theorems algebraically.

CWC.M.GHS.40: : Use coordinates to prove simple geometric theorems algebraically. (e.g., Prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, square root of 3) lies on the circle centered at the origin and containing the point (0, 2).)

AP: : Applications of Probability

6.1: : Understand independence and conditional probability and use them to interpret data.

AP.M.GHS.43: : Understand that two events A and B are independent if the probability of A and B occurring together is the product of their probabilities, and use this characterization to determine if they are independent.

AP.M.GHS.44: : Recognize the conditional probability of A given B as P(A and B)/P(B), and interpret independence of A and B as saying that the conditional probability of A given B is the same as the probability of A, and the conditional probability of B given A is the same as the probability of B.

AP.M.GHS.46: : Recognize and explain the concepts of conditional probability and independence in everyday language and everyday situations.

6.2: : Use the rules of probability to compute probabilities of compound events in a uniform probability model.

AP.M.GHS.47: : Find the conditional probability of A given B as the fraction of B’s outcomes that also belong to A, and interpret the answer in terms of the model.

AP.M.GHS.49: : Apply the general Multiplication Rule in a uniform probability model, P(A and B) = P(A)P(B|A) = P(B)P(A|B), and interpret the answer in terms of the model.

AP.M.GHS.50: : Use permutations and combinations to compute probabilities of compound events and solve problems.

6.3: : Use probability to evaluate outcomes of decisions.

AP.M.GHS.51: : Use probabilities to make fair decisions (e.g., drawing by lots and/or using a random number generator).

AP.M.GHS.52: : Analyze decisions and strategies using probability concepts (e.g., product testing, medical testing, and/or pulling a hockey goalie at the end of a game).

Correlation last revised: 1/10/2023

West Virginia - Mathematics: Geometry

College- and Career-Readiness Standards | Adopted: 2015