Here are some more questions for you math enthuaists.

I'll explain to you where I ca

1. An equilateral triangle has a perimeter of 24 cm. Find the area of the circle which is inscribed in the triangle.

(16pie)/3 cm^2, but how and why?

My work: I got 3 more equalateral triangles (side lengths =4).

Got a triangle in the circle. Lengths = 4.

Right triangle in circle = sqrt(12), 4, 2.

Now... I'm stuck.

2. Given a circle inscribed in an isosceles trapezoid bases 8 cm and 18 cm.

Find:

a) The diamter of the circle.

2. The area of the shaded region.

I don't knwo how to approach this problem. Or even start it. Class never learned this, but teacher said we should know this by now.