1. Classify the triangle by its angles and by its sides.
Example 2
Classify Triangles by Angles and Sides
Classify the triangle by its angles and by its sides. a. b. c.
SOLUTION
Because this triangle has 3 angles with measures
less than 90° and 2 congruent sides, it is an acute isosceles triangle. a.
Because this triangle has a right angle and no congruent sides, it is a right scalene triangle. b.
Because this triangle has one angle greater than 90° and no congruent sides, it is an obtuse scalene triangle. c. 1

2. Classify the triangle by its sides.
Checkpoint
Classify Triangles by Angles and Sides
Classify the triangle by its sides. 4.
ANSWER
acute isosceles
triangle 5.
ANSWER
acute scalene triangle 6.
ANSWER
obtuse isosceles triangle