Triangles Day

Which triangle can be classified as scalene?

Which triangles belongs in the intersection of "Acute triangles" and "Isosceles triangles"?

Which figures belong in the part of the organizer labeled "isosceles triangles"?

An acute triangle has ​ (a)   acute angles in it.

This is a Scalene Acute triangle because all of it's sides are unequal and (a)   angles acute.

Label the angles in this triangle.

Classify the following triangle. This triangle is called a (a)   .

This is an isosceles triangle because it has ​ (a)   sides that are congruent.

Which of these angles is obtuse?

A ​ (a)   triangle has ​ (b)   right triangle,