I believe it would be three angles and one angle shown!
Part A:
3.14 X (4)^2 X 3/3
= 50.26548246
Add together your portions 1 + 3 + 5 = 9
divide 72 by 9 = 8
Each portion is multiplied by 8
1 x 8 = 8
3 x 8 = 24
5 x 8 = 40
Your portions are 8kg:24kg:40kg
Is this correct? Add 8 + 24 + 40. Do they equal 72? yes. Your portions are correct.
perimeter = sum of all sides
27 = 9+7.8+x
x (third side) = 10.2
