The perimeter of an isosceles triangle is 90 cm. If the case is 26 cm, then find the length of the equal sides.
Answer & explanation
Correct answer: option 4
The perimeter of an isosceles triangle = 90 cm.
Base = 26 cm
We know that,
P = (2a + b)
Where, p = perimeter
a = side and b = another side
Let the length of the equal sides be m
P = (2a + b)
= 90 = 2m + 26
= (90 – 26) = 2m
= 64 = 2m
= m = 32