Question

In ∆ABC, AB = AC = x, BC = 20 cm and area of the ∆ is 250 sq cm. Find the value of x.​

Answer 1

Step-by-step explanation:

by herons formula

s=x+x+20/2

s= x+10

250=1/2 √(x+10)(10)(10)(x-10)

500 = 10√(x+10)(x-10)

2500=x^2+100

2400=x^2

20√6 cm=x