Question

If the perimeter of a **scalene** triangle is 54.6 cm. What equation can be used to find the value b if side a **measures** 8.7 cm.?

Answer 1

`b=45.9-c` (cm.)

Explanation:

I assume the triangle has sides labelled `a, b,` and `c`

The perimeter `a+b+c` is given to be `54.6` cm
and side `a` is given to be `8.7` cm.

This leaves
`color(white)("XXX")b+c=45.9` cm.
or
`color(white)("XXX")b=(45.9 -c)` cm.