C1 delphis paper question help

I need help answering part iii. Thanks in advance.

Original post by Butterflyshy

I need help answering part iii. Thanks in advance.

1) Find the radius of the semi-circle. Use

C=2\pi r

but remember that you only have half the circle.

2) Find the area of the semicircle. Use

A=\pi r^2

with comment as above.

3) Show that

A > 2k^2

. Use the fact that

\pi < 4

and the rules of inequalities.

(edited 6 years ago)

1) Find the radius of the semi-circle. Use

Unparseable latex formula:

C=2\pir

but remember that you only have half the circle.

2) Find the area of the semicircle. Use

A=\pi r^2

with comment as above.

3) Show that

A > 2k^2

. Use the fact that

\pi < 4

and the rules of inequalities.

Thanks that makes so much sense😀

Original post by Butterflyshy

Thanks that makes so much sense😀

In fact, I had mis-latexed the first equation. I have corrected it, so it should be even more wonderful now.

In fact, I had mis-latexed the first equation. I have corrected it, so it should be even more wonderful now.

Dont worry i understood what you were trying to say

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