Aligned Standard
M.EE.8.G.5: Compare any angle to a right angle, and describe the angle as greater than, less than, or congruent to a right angle.
Grade Level Standard
This is aligned with the following California State Standards:
- 8.G.5 - Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.
Linkage Level Descriptions
Initial Precursor
Recognize attributes or characteristics of an object, such as color, orientation, length, width, and weight.
Distal Precursor
Recognize an angle as a figure formed by two rays sharing one endpoint.
Proximal Precursor
Recognize angles that are either acute, obtuse, or right.
Target
Compare the measure of an angle to the measure of a right angle, and communicate whether the measure of the angle is greater than, less than, or congruent to the measure of the right angle.
Successor
Explain that complementary angles are pairs of angles with measures that add up to 90 degrees (e.g., a 40-degree angle and 50-degree angle).