The sum of these angles is 180˚. There is one missing angle in this complete turn. To find the size of the missing angle, first form an equation that is equal to 360˚. 𝒂 + 135 = 360.

Save guides, add subjects and pick up where you left off with your BBC account. STEP 2: Label the angle you know and colour in the angle arc. Colour in the opposite angle in the same colour ...