C = pi * r ^squared
r = is radius
square the radius, multiple by r
or
2 x pi x r
Solution:
<u>We know that:</u>

<em>Since we are already given the base and the height, we can substitute them into the formula to find the area of the triangle.</em>

<u>Cancel out the "2" by dividing it by 18.</u>

<u>Simplify the multiplication.</u>

Yes, this identity is true. Those two operations are equivalent.