# Math Help - question

1. ## question

find the area of the largest equilateral triangle that can be inscribed in a circle whose diameter is 20 cm.
PLEASE CAN YOU ANSWER NOW!

2. Originally Posted by queennie
find the area of the largest equilateral triangle that can be inscribed in a circle whose diameter is 20 cm.
PLEASE CAN YOU ANSWER NOW!
519.615 sq cms.

Oppsss... that's for 20 cm radius, divide by 4 for 20 cm diameter ~= 129.9 sq cm

But why??

CB

3. Hello, queennie!

The Captain used 20 as the radius.

Find the area of the largest equilateral triangle that can be inscribed
in a circle whose diameter is 20 cm.

PLEASE CAN YOU ANSWER NOW!

Yes . . . $75\sqrt{3} \:\approx\:129.9\text{ cm}^2$

Any idea about WHY?