20 because of the whole is 40 and the shaded part is by 20 you just take half of 40 and you get 20
Answer:
5
Step-by-step explanation:
A=a+b/2 x h
4 = a
5 = b
8 = h
4 + 5 / 2 = 4.5
4.5 x 8 = 36
So the other base length is 5
The arc length, radius and the included angle are related as
where
is in radians.
The radius
is given by

Correct choice is (B).
Answer is 143. See picture for explanation
Answer:
I dont know uhm i think no sorry if im wrong
Step-by-step explanation: