anonymous
  • anonymous
Find the area of the irregular shape. Round to the nearest tenth. PIC: http://www.mediafire.com/view/?67m8kuz77hcttep Answers: a. 90.2 cm² b. 241 cm² c. 65.1 cm² d. 72.3 cm²
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
plz help @cgreenwade2000
mathstudent55
  • mathstudent55
You have an 8-cm by 5-cm rectangle plus a half circle with 4 cm radius. Do you know the folrmulas for the areas of a rectangle and a circle?
anonymous
  • anonymous
I know formula for the area of a circle....

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mathstudent55
  • mathstudent55
Ok, so you need half the area of a circle with radius 4 cm. The area of a rectangle is A = LW, where L = length and W = width
anonymous
  • anonymous
A = pi x r^2
mathstudent55
  • mathstudent55
Right. Calculate that and divide by 2 because you have only half a circle. Then add that to A = LW, with L = 8 cm and W = 5 cm, which is the area of the rectangle.
anonymous
  • anonymous
I really need to hurry!!!! I can't in time!!!!!
anonymous
  • anonymous
3.15 * 8 = 25.2
mathstudent55
  • mathstudent55
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anonymous
  • anonymous
Oh no! I have to go! I'll just get the answer wrong :/
anonymous
  • anonymous
Yes....
mathstudent55
  • mathstudent55
That's good. You have the area of the half circle. Now you need to calculate the area of the rectangle and add the two areas.
anonymous
  • anonymous
So 40 + 25.2 = 65.3. That's the answer?
anonymous
  • anonymous
But 65.3 isn't an answer choice.
mathstudent55
  • mathstudent55
40 + 25.1 = 65.1
mathstudent55
  • mathstudent55
You got it! Good work.
anonymous
  • anonymous
The answer is 6.1. I just did it and got it right!
anonymous
  • anonymous
Alright! Thx! :D
mathstudent55
  • mathstudent55
wlcm

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