Question

Write an expression for the length of the third side of an isocoles triangle

Answer 1

`y = 180 - 2x`

Explanation:

Required

Triangle: Isosceles

Required

An expression for the third side

Let the equal sides be x and the third side be y

From triangle sum theorem, we have the following expression:

`x + x + y = 180`

`2x + y = 180`

Subtract 2x from both sides

`-2x +2x + y = 180 - 2x`

`y = 180 - 2x`

Hence, the third side of an isosceles triangle is:
`y = 180 - 2x`