Question

PLS ANSWER FAST 20 points The base of an isosceles triangle is 4 cm and its perimeter is 20 cm find its area

Answer 1

Answer:

Let the sides of the triangle be a, a and b.

b = 4cm

perimeter = 20cm

⇒ a + a + b = 20cm

⇒ 2a + 4 = 20

⇒ 2a = 20 - 4 = 16cm

⇒ a = 16/2 = 8cm

s = perimeter/2 = 20/2 = 10cm

Area is 4√15 cm².