Use the formula for area of a circle,

and they give an approximation so use that for pi
70 + 78 + 91 = 239
239 - 42 - 36 = 161
-4,0 is the solution to your problem
Answer:
Step-by-step explanation:
2x*2x=4x^2
2x*3=6x
Keep in mind 4x^2-6x
then next part:
3*2x=6x
3*3=9
6x-9
So totally
(4x^2-6x)-(6x-9)
Minus and minus is equal to +
(4x^2-12x+9)+2=45
4x^2-12x+11=45
-11 on both sides
4x^2-12x=34
X= -17/-2
Answer:
170 degree. is the answer