
Then

which is a disk of radius 1, hence with area
.
First divide 3 both side
Than move 4 to another side
Than divide by 2
(3x +4) + (6x + 5) = 90*
*note that complementary = 90, supplementary = 180
9x + 9 = 90
9x = 90 - 9
9x/9 = 81/9
x = 9
hope this helps
((3-.5)/.5) x 100
that will give you your answer
Answer:
a) 14
b) green
c) fraction 6/14
percentage: 42.8% rounded: 40%
not sure about the decimal tho