This section deals with 2D shapes and angles related to them. It might be worth looking at the National 4 Angles section before continuing.
For any triangle, the three angles add up to .
Find the value of in the triangle below.
An equilateral triangle is one with all three sides equal in length and all three angles equal to .
An isosceles triangle is one with two sides equal in length and two equal angles.
In this diagram, the triangle is isosceles so both base angles equal .
What is the value of ?