How do you use Heron's formula to find the area of a triangle with sides of lengths #23 #, #21 #, and #20 #?
Heron's formula states that
Where s is the sum of all sides / 2 (Also known as the semiperimeter)
a,b,c are the side lengths
From here, you can just plug in all the values.
Find that s = 32
prime factorize the inside to get
Then take out the squares to get