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**emmakatecumbo****Member**- Registered: 2017-09-22
- Posts: 35

I need help, I have the answers to every one of the questions but my teacher is asking for the work as well, My dad helped me with everything but he is out of town, so i have no idea how to do the work and I need it done soon, could someone please help show the work for the problems I have answered. I would greatly appreciate it

What is the area of the circle if the radius is:
1. 4

16*pi

2. SQRT(3)

3*pi

3. 7

49*pi

4. 6x

36 x^2 * pi

5. 10

100*pi

What is the radius if the area of the circle is:
6. 9(PI)

3

7. 4x^2(PI)

2x

8. 25(PI)

5

9. 81(PI)

9

10. 5(PI)

sqrt 5

11. (9/16)PI

3/4

12. 25y^2(PI)

5y

13. 16z^2(PI)

4z

14. t^2(PI)

t

15. t^2(PI)

1

What is the area of the sector if the radius is 6 and the degree measure is:
16. 26

2.68*pi = 9.523

17. 30

3*pi

18. 50

5*pi

19. 90

9*pi

20. 120

12*pi

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**Monox D. I-Fly****Member**- Registered: 2015-12-02
- Posts: 975

For 1 - 5, area = pi*(radius^2). Now show us your work for those numbers first.

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,206

hi emmakatecumbo

Those answers look good to me so I don't quite understand why your teacher wants more. If the questions required a long answer, then it's not unusual for a lot of working to be required but these only take a line anyway. There's a story (which probably isn't true) that a Cambridge undergraduate was awarded a 'first' for a one line answer in the final exam because it was a new and potentially genius way of doing the problem.

Here's a model answer giving all the steps:

In your area of squares and rectangle questions:

Hope that helps,

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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