Question

The semicircles are congruent to one another with a diameter of 4 inches. What is the perimeter of the sign?
Answer
about 38 inches
about 78 inches
about 76 inches
about 80 inches

Answer 1

c = 3.14 * 2= 6.28 * 8 = 37.7+ 40 =77.7

Answer 2

C = [2(pi)r]/2

circumference of a semicircle

C = [4(pi)]/2, circumference using your radius
C = 2(pi), circumference of one semi-circle

C = 6[2(pi)] circumference of the 6 semi-circles.

Total perimeter = 6[2(pi)] + 20 + 20

Answer 3

the perimeter of circles are 3.14d - these are semicircles so take 1/2

multiply by 6 , sinc it is s6 of them
then add to 40 for the other sides

Answer 4

3*2*pi*2+20

Answer 5

There are 3 full circles. So, calculate circumference of the circle and multiply by 3.
=> pi*4*3
=> 12pi

Now, you have to add two times 20 inches for the side lengths.

Answer: 12pi + 40 inches.

Answer 6

so i get 77.68 and i should round that to 78 right ?

Answer 7

Yep.

Answer 8

thank u guess XD