Question

How would I solve this?
Use the following to answer the question. Triangle a = 12, b = 15, c = 21.
The value of s in the formula for area is?

Answer 1

s is the semi-perimeter. This is called Heron's formula.
http://en.wikipedia.org/wiki/Heron's_formula

Answer 2

\[A = \sqrt{(s)(s-a)(s-b)(s-c)}\]

Answer 3

s = (a + b + c)/2

Answer 4

24! Thanks!

Answer 5

s = 24
A = sqrt(24 * 12 * 9 * 3)


>>> a = 24*12*9*3
>>> a
7776
>>> a**0.5
88.18163074019441