Question

A) find the internal angle sum (s)

Please help!

Answer 1

interior angles =180(n-2)

180 (5-2)

180×3=540

540-(155+80+95+90)=x

x=120

Answer 2

Explanation:

a) ( n - 2 ) × 180°, where n = 5

( 5 - 2 ) × 180° = 3 × 180° = 540°

b) Total sum must equal 540° so

80° + 155° + 95° + ( The right angle which is 90° ) + x = 540°

420° + x = 540°

x = 120°