Question

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

Answer 1

Answer:

$y = 180 - 2x$

Step-by-step 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: $y = 180 - 2x$