# How do you solve the triangle given #trianglePQR, p=12, q=16, r=20#?

##### 1 Answer

Nov 29, 2017

18.97 (2.d.p)

#### Explanation:

As we are given 3 sides of the triangle, with no right angle, we can use Heron's formula to solve for the area. Heron's formula can be used when we know the 3 sides of a triangle, which in this case we know

Heron's formula:

where s =

In this case, we can assume

So,

= 24

Now, we just plug the numbers into Heron's formula to get the area of the triangle.

A =

= 18.97 (rounded to two decimal places)