Question

Help?

Answer 1

@ganeshie8

Answer 2

You know radius of given semicircle, \(r=8\)

can you find the area ?

Answer 3

Do I divide the radius by 2 to find the area of a semicircle?

Answer 4

No, first find the the area of entire circle

Answer 5

then take half of that area

Answer 6

a= 201.06

Answer 7

Careful, you need to use pi = 3.14

Answer 8

Could you give me the formula?

Answer 9

Area of region inside full circle :
\[A = \pi\times r^2 = 3.14\times 8^2 = 200.96\]

Answer 10

take half of that to get the area of semi circle

Answer 11

100.48 :)

Answer 12

Yes, put that aside.

Next find the area of triangle

Answer 13

Notice that its base is the diameter of circle : b = 16
and height is the radius of circle : h = 8

area of triangle = ?

Answer 14

Do we multiply 3.14 by the radius?

Answer 15

use area of triangle formula
look up in ur notes

Answer 16

Found it!

Answer 17

64!

Answer 18

Yes subtract that from the area of semicircle that you found earlier

Answer 19

that gives the area of shaded region

Answer 20

36.48yd^2

Answer 21

Area of shaded regin = (Area of semicircle) - (Area of triangle)
= (100.48) - (64)
= 36.48

Answer 22

It would be yd^2 because area is squared, right?

Answer 23

You're correct! units for area is always ^2

Answer 24

Thank you!

Answer 25

yw