Question

the perimeter of an isosceles triangle is 40 centimetre. the base is the two third of the sum of equal sides. find the length of each side​

Answer 1

Step-by-step explanation:

let equal sides be X

base=2/3×2x=4/3x

X+4/3x=40

Answer 2

Answer:

a+a+b=40

2a+b=40

2a=40-b

B=2/3(a+a) = 3b=80-2b

5b=80

B=18

2a=40-16

2a=24

A=12

S=40/2

=20cm

Area of angleABC = underroot 20(20-12)×(20-12)×(20-16)

=underoot20(8)×(8)×(4)

= 8×2×2underoot5

32root5