Math Is Fun Forum

Sinead123

Guest

Radian/Trigonometry Question Help

Hi there.
I am in what I believe to be the equivalent of 11th grade (5th year in Ireland) and am really struggling with one particular question. I have truly tried and failed every approach.
As a diagram is included I have just taken a pic of the question: tinypic. com/view.php?pic=mkwvah&s=8#.UwdUNvl_tN4
It is just Q.13 I need help with.
Also, just to say although I have never used the forum before, this site has been such a huge help to me!
Many, many thanks!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,643

Re: Radian/Trigonometry Question Help

hi Sinead123

Welcome to the forum.

The radius is 8, so you can calculate the right hand quarter circle with 1/4 pi r squared.

For the left hand side do the same and subtract that answer from the area of a 8x8 square.

Hope that helps,

Bob

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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
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Sinead123

Guest

Re: Radian/Trigonometry Question Help

Thank you so much! Especially for such a quick reply. I figured it all out.