How do you use Heron's formula to find the area of a triangle with sides of lengths #3 #, #5 #, and #7 #?
1 Answer
Apr 17, 2016
First, I like to start by writing out the formula:
A =
Explanation:
First, perimeter: 3 + 5 + 7 = 15
Then, semiperimeter:
Now, Area =
or about 6.495 square units.