Answer:
B.10
Step-by-step explanation:
15=1/2b(3)
30=3b
10= base
Answer:
Perimeter= 49
area= 360
Step-by-step explanation:
perimeter means you need to add 40+9 and area means you must multiple the numbers.
Answer:
D
Step-by-step explanation:
cosΘ =
= 
4pi/2pi = x/360
use a proportion
2 radians equals 360 degrees
x = 720 degrees