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Activity 3.8
Assignment 3.13
Classifying Triangles: Angles
Objectives
Classify triangles by angles as acute, right, or obtuse.
Name the right angles, acute angles, legs, and hypotenuses of right triangles.
Assignment 3.9
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About Geometry Worksheet Assignment 3.13:
Assignment 3.13 is an introduction to classification of triangles by types of angles.
Prerequisite Skills: Name line segments (Assignment 1.12). Name angles (Assignment 2.4). Identify right angles (Assignment 2.10). Classify triangles by congruent sides (Assignment 3.12).
Definitions: A triangle with all acute angles is an acute triangle.
A triangle with a right angle is a right triangle. The perpendicular sides of a right triangle are its legs. The other side is the hypotenuse.
A triangle with an obtuse angle is an obtuse triangle.
Theorem: In a right triangle, one angle is a right angle and the other two angles are acute..