Question

If the perimeter of isosceles ΔABC is 45 and side AC is 11, give one possible value for the length of side BC.

Answer 1

Hello from MrBillDoesMath!

Answer:

23

Discussion:

In ΔABC side AC is 11, but as the triangle is isosceles the other leg also has length 11. Let the third, unknown side, be called x. Then

11 + 11 + x = Perimeter = 45.

11 + 11 + x = 45 => as 11 + 11 = 22

22 + x = 45 => subtract 22 from both sides

x = 45 -22 = 23

Thank you,

MrB