Question

Find the value of s in the triangle shown below. 80° 7 7 9

Answer 1

We can see that this is an isosceles triangle, since both sides have the same length. Then the both angles that are unknown need to be the same. So we have

`\begin{gathered} 2x\text{ + 80 =180} \\ 2x=100 \\ x=50 \end{gathered}`

So x = 50 °.