College and Career Ready Standards

G.CO.1: Verify experimentally (for example, using patty paper or geometry software) the properties of rotations, reflections, translations, and symmetry:

G.CO.1a: Lines are taken to lines, and line segments to line segments of the same length.

Reflections

Rotations, Reflections, and Translations

Similar Figures

Translations

G.CO.1b: Angles are taken to angles of the same measure.

Reflections

Rotations, Reflections, and Translations

Similar Figures

Translations

G.CO.1c: Parallel lines are taken to parallel lines.

Reflections

Rotations, Reflections, and Translations

Similar Figures

G.CO.2: Recognize transformations as functions that take points in the plane as inputs and give other points as outputs and describe the effect of translations, rotations, and reflections on two-dimensional figures.

G.CO.3: Given two congruent figures, describe a sequence of rigid motions that exhibits the congruence (isometry) between them using coordinates and the non-coordinate plane.

Absolute Value with Linear Functions

Circles

Dilations

Holiday Snowflake Designer

Proving Triangles Congruent

Reflections

Rotations, Reflections, and Translations

Similar Figures

Translations

G.CO.5: Given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.

Absolute Value with Linear Functions

Circles

Dilations

Holiday Snowflake Designer

Proving Triangles Congruent

Reflections

Rotations, Reflections, and Translations

Similar Figures

Translations

G.CO.6: Demonstrate triangle congruence using rigid motion (ASA, SAS, and SSS).

Proving Triangles Congruent

Rotations, Reflections, and Translations

Translations

G.CO.7: Construct arguments about lines and angles using theorems. 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. (Building upon standard in 8th grade Geometry.)

G.CO.9: Construct arguments about the relationships between two triangles using theorems. Theorems include: SSS, SAS, ASA, AAS, and HL.

Isosceles and Equilateral Triangles

Proving Triangles Congruent

Pythagorean Theorem

Pythagorean Theorem with a Geoboard

Triangle Angle Sum

Triangle Inequalities

G.CO.10: Construct arguments about parallelograms using theorems. 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. (Building upon prior knowledge in elementary and middle school.)

Parallelogram Conditions

Special Parallelograms

G.CO.11: 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.

Constructing Congruent Segments and Angles

Constructing Parallel and Perpendicular Lines

Segment and Angle Bisectors

G.CO.12: Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle.

Concurrent Lines, Medians, and Altitudes

Inscribed Angles

G.SRT.1: Use geometric constructions to verify the properties of dilations given by a center and a scale factor:

G.SRT.1a: 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.

G.SRT.1b: The dilation of a line segment is longer or shorter in the ratio given by the scale factor.

G.SRT.2: Recognize transformations as functions that take points in the plane as inputs and give other points as outputs and describe the effect of dilations on two-dimensional figures.

G.SRT.4: Understand the meaning of similarity for two-dimensional figures as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

Circles

Congruence in Right Triangles

Dilations

Proving Triangles Congruent

Similar Figures

Similarity in Right Triangles

G.SRT.5: Construct arguments about triangles using theorems. 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, and AA.

Pythagorean Theorem

Pythagorean Theorem with a Geoboard

Similar Figures

G.SRT.6: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

Chords and Arcs

Congruence in Right Triangles

Constructing Congruent Segments and Angles

Dilations

Perimeters and Areas of Similar Figures

Proving Triangles Congruent

Similar Figures

Similarity in Right Triangles

G.SRT.7: Show 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.

Sine, Cosine, and Tangent Ratios

G.SRT.9: Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

Cosine Function

Distance Formula

Pythagorean Theorem

Pythagorean Theorem with a Geoboard

Sine Function

Sine, Cosine, and Tangent Ratios

Tangent Function

G.C.2: 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.

Chords and Arcs

Circumference and Area of Circles

Inscribed Angles

G.C.3: Construct arguments using properties of polygons inscribed and circumscribed about circles.

Concurrent Lines, Medians, and Altitudes

Inscribed Angles

G.C.4: Construct inscribed and circumscribed circles for triangles.

Concurrent Lines, Medians, and Altitudes

Inscribed Angles

G.C.5: Construct inscribed and circumscribed circles for polygons and tangent lines from a point outside a given circle to the circle.

Concurrent Lines, Medians, and Altitudes

Inscribed Angles

G.C.6: 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.

G.GPE.1: Write the equation of a circle given the center and radius or a graph of the circle; use the center and radius to graph the circle in the coordinate plane.

G.GPE.2: Derive the equation of a circle of given center and radius using the Pythagorean Theorem; graph the circle in the coordinate plane;

Circles

Distance Formula

Pythagorean Theorem

Pythagorean Theorem with a Geoboard

G.GPE.3: Complete the square to find the center and radius of a circle given by an equation.

Circles

Distance Formula

Pythagorean Theorem

Pythagorean Theorem with a Geoboard

G.GPE.4: Derive the equation of a parabola given a focus and directrix; graph the parabola in the coordinate plane.

Addition and Subtraction of Functions

Parabolas

Translating and Scaling Functions

Zap It! Game

G.GPE.5: Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant; graph the ellipse or hyperbola in the coordinate plane.

G.GPE.8: Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, including the use of the distance and midpoint formulas.

G.GMD.1: 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 and informal limit arguments.

Circumference and Area of Circles

Prisms and Cylinders

Pyramids and Cones

G.GMD.2: Give an informal argument using Cavalieri’s principle for the formulas for the volume of a solid figure.

Prisms and Cylinders

Pyramids and Cones

Correlation last revised: 9/15/2020

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