Question 185442
For a polygon of n sides, the sum of all angles is 180n – 360 degrees


We are given that two sides are 90 degrees and the remainder are 150 degrees


Therefore 180n – 360 = 150(n – 2) + 90 x 2 = 150n – 300 + 180


180n = 150n + 360 + 180 – 300


30n = 240


n = 8


Therefore it is an octagon with six angles 150 degrees and two right angles.