In the rectangle below, the two quarter-circles are congruent. Find the area of the shaded region. If necessary, round your answer to two decimal places.

Question

anonymous · Answer

attachment

dumbcow · Answer

shaded = Rect - 2*sector

radius = 6
rectangle is 6 by 12

jack1 · Answer

*circle, my bad (corcle is not a word...yet)

jack1 · Answer

so how'd u go?

jack1 · Answer

* dammit fat fingers again
* meant to be:
so area of rectangle minus 1/2 area of circle = area of shaded part

jack1 · Answer

area of the rectangle = L x W
area of the circle = pi r ^2
L = 2r
W =r
r = 6

anonymous · Answer

Sorry i was getting orange juice -__ -

jack1 · Answer

all good

anonymous · Answer

Would it be units squared ?

anonymous · Answer

or just units

jack1 · Answer

squared (area always measured in units sqrd)

anonymous · Answer

So would my answer is 6 ?

anonymous · Answer

Oh no your saying r = 6 dumb me.

anonymous · Answer

113.04

jack1 · Answer

i got a much lower answer

jack1 · Answer

Area of rectangle = ?

anonymous · Answer

Wow i would do the area of a circle for a rectangle.

anonymous · Answer

12 ahaha

anonymous · Answer

use *

jack1 · Answer

area of rectangle = L x W
= 2r x r
= 12 x 6
= 72

jack1 · Answer

area of circle = pi x r^2
= pi x 6^2
= 36pi

anonymous · Answer

Isn't 72 too much ? :o

jack1 · Answer

it's a quarter circle, it's dimensions have to be 2r x r (rectangle)

jack1 · Answer

so (area of rectangle) minus (1/2 * (area of circle) = area of shaded part

anonymous · Answer

I forgot never question a mentor, i see why (:

jack1 · Answer

no, dude question EVERYTHING! is a rule to live by, trust me

jack1 · Answer

its how you learn and how you stop ppl getting away with stuff

jack1 · Answer

ie abuse of power IRL

anonymous · Answer

I'll take your word for it since you are more wise

jack1 · Answer

so how'd u go with ur area? jew get a final answer?

anonymous · Answer

Your kidding, 72 wasn't the final answer ?

anonymous · Answer

Well there goes getting that answer right.

jack1 · Answer

....?
so (area of rectangle) minus (1/2 * (area of circle) = area of shaded part
72 was just area of rectangle

jack1 · Answer

sorry dude, will use pics next time

anonymous · Answer

I do my homework online so i automatically got it wrong. ahaha

jack1 · Answer

damn

anonymous · Answer

It's fine though, it doesn't matter.

jack1 · Answer

ok, just incase you can request a do over, i got 15.451 as my answer for the shaded part

anonymous · Answer

No really it's fine if i get over a certain percent i pass, should i stress that i need to do 3 more units before monday ? I'm asking because you're experienced :D