Triangles

Watch this lecture series, which discusses how to classify triangles by lengths of their sides and measures of their angles.

Practice

Classify triangles by angles - Questions

1. Classify \triangle A B C by its angles.



Choose 1 answer:

(A) Acute triangle

(B) Obtuse triangle

(C) Right triangle

2. Classify \triangle J K L by its angles.



Choose 1 answer:

(A) Acute triangle

(B) Obtuse triangle

(C) Right triangle

3. Classify \triangle D E F by its angles.



Choose 1 answer:

(A) Acute triangle

(B) Obtuse triangle

(C) Right triangle

4. Which figure is an acute triangle?

Choose 1 answer: