Question

An equilateral triangle and a square are joined together Work out the value of a

Answer 1

210 degrees.

Explanation:

The angles inside an equilateral triangle are all = 60 degrees.

The angles in a rectangle are all = 90 degrees

The total angles in a circle = 360 degrees.

Therefore

angle a = 360 - (60 + 90)

= 360 - 150

= 210 degrees.