Question

@Shadow

Answer 1

How do you think we should approach this problem?

Answer 2

no clue

Answer 3

Well, what shapes do you see?

Answer 4

semicircle and rectangle

Answer 5

rectangle is 24

Answer 6

Hmm, if you do a rectangle, you leave a semicircle on the bottom. Then you have two semicircles that you have to solve for.

Answer 7

yeah, i dont know how to do the semicirlces though

Answer 8

Do you know how to solve for the area of a circle?

Answer 9

a= 3.14 r^2

Answer 10

\[A = \pi r^2\]

Correct. So what do we need in order to solve that?

Answer 11

radius?

Answer 12

What is the radius half of?

Answer 13

diameter

Answer 14

What is the diameter?

Answer 15

Of any circle

Answer 16

Define it for me

Answer 17

the width

Answer 18

A straight line through the center that goes from one point on the edge of a circle, to the other edge?

Answer 19

somebody actually just gave me the answer so im done with this one XD

Answer 20

What did they get?

Answer 21

12+9.125

Answer 22

Do you know how they got that?

Answer 23

kinda

Answer 24

Well, since in the picture it gives us two points on the semicircle ...



We can draw the diameter. That also gives us a triangle. We know how to solve triangles, just (3 times 8)/2 which is 12. You could actually solve this correctly using Pythagoras' Theorem to get the hypotenuse (since it's a right angle) then halving what you get for the radius of the semi circle. Then you'd use A = pir^2 then divide it by 2 to get the area of the semi circle.

Answer 25

okay

Answer 26

Hypotenuse is approx 8.5, half it for radius. 4.25

Square it for A = pi r^2, you get approx 18, half it, you get approx 9

Answer 27

Thus

\[12 + 9.125\pi\]

Answer 28

okay i understand now.

Answer 29

Open a new question