Question

Find the value of the unknown x in the following diagram:

Answer 1

The sum of all interior angles of a triangle is 180°. By using this property, these problems can be solved as follows:

50° + x + x = 180°

50° + 2x = 180°

2x = 180° − 50°

2x = 130°

x = `(130°)/2`

x = 65°