math jj 118

mqt

1.        有个三角型（或是等边三角型？)，内切一个圆，圆面积为8派，求三角型的高。6√2

答案应该是3倍根号2把?

systemunknow

nope i just did that problem.... Here is what I got

First go with pi(r^2) = 8pi then you'll have r^2 = 8 r= 2√2  Now, do the 30, 60, 90 triangle

you'll have √3* x, x, and 2x we already know x = 2√2 from radius.  so half of the side of triangle is √3 * 2√2 = 2√6  then do the 30,60,90 again to find the height you have x = 2√6 Now to find the height = 2√6  * √3 = 2√18 = 3*2√2 =6√2

   and that's the final answer hope that helps