Question

would really appreciate it if anyone could help me, I keep getting my calculations wrong and the website keeps saying my answer is wrong please help

Answer 1

Answer:

In an isosceles triangle, the two legs have the same length. So if one leg is 2x-5, the other leg is also 2x-5 .let the other side be x.

we know,The perimeter is the sum of the three sides of the triangle:

x+2x-5+2x-5=20° [ given]

x+2x+2x-10=20

5x=20+10

5x=30

x=30/5

x=6.