Triangles 



1. Types of triangles based on angles
A triangle is a polygon with three sides and three interior angles.
If you see the triangle 1, you will see that it has a right angle (ABC), it is called right triangle. The triangle 2 has an obtuse angle (BAC), it is called obtuse triangle. The triangle 3 has 3 acute angles and it is called acute triangle.
Answer these questions: