Answer:
A and E
Step-by-step explanation:
The perimeter is the length of the edge of the overall shape. In this case, the edge includes the length of the curved section of both semicircles (since semicircles are the same size, we can just find the circumference for a circle with the same radius), plus four side lengths of the square.
The radius is 10 (Two squares line up exactly with the semi-circles).
Circumference: 2πr=2π10=20π
Perimeter =20π+4(10)=40+20π
A
40+20π=40+20π? YES
B
40+20π=80+20π? NO
C
40+20π=120+30π? NO
D
40+20π=300+100π? NO
E
40+20π=10+10+10π+10+10+10π? YES
