Question

8. Find the length of the equal sides of an isosceles
triangle whose base is 40 cm and perimeter is
140 cm.
5 am​

Answer 1

Answer:

let b be the length of an isosceles triangle

we know that perimeter of an isosceles triangle is 2a+b

so 2•40+b=140

80+b=140

b=140-80

b=160