Question

Figure WXYZ is a rectangle with a semicircle added to its base.
What is the perimeter of figure WXYZ? Use 3.14 to approximate pi.

http://static.k12.com/calms_media/media/1571000_1571500/1571378/1/b7f2effd9180873ef5c67beabab3831ac0ad3470/MS_IMB-1401212-1110906.jpg

Answer 1

ok so first add up the 3 sides

Answer 2

16+7+7 right

Answer 3

then we have half of a circle added onto the base

Answer 4

the length around a circle is the circumference, this is only half of a circle, so we want to find half of the circumference.

Answer 5

which will be semi circle formula right? :/

Answer 6

the formula for circumference of a circle is pi times diameter i think

Answer 7

yeah its like pi x 2 x diameter i think

Answer 8

2 times pi times r

Answer 9

2r = diameter

Answer 10

16 x 7 x 3.14?

Answer 11

well, the circumference would be 16 x 3.14

Answer 12

but since this is only half a circle we want half of whatever that is

Answer 13

I calculated that & got 50.24 & half of that is 25.12

Answer 14

alright then we add that to 16+7+7

Answer 15

= 30

Answer 16

30+25.12

Answer 17

55.12