Posted by Jerald on Wednesday, March 6, 2013 at 6:12pm.
The triangle below has a height of 12 feet and a base of 9 feet. What is the area of the triangle?
If the area of a square is 81 square meters which formula would you use to calculate the perimeter of the square?
The circumference of this circle is approximately 66 inches. What is the radius?
- Math - Ms. Sue, Wednesday, March 6, 2013 at 6:17pm
The first two are correct. Your last one isn't right.
C = pi * d
- Math - Jerald, Wednesday, March 6, 2013 at 6:20pm
I don't know the diameter.
- Math - Ms. Sue, Wednesday, March 6, 2013 at 6:24pm
But you do know the circumference. And you know the value of pi.
- Math - Jerald, Wednesday, March 6, 2013 at 6:28pm
Oh. Because I was using the formula radius=C/2 pi
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