# The perimeter of an isosceles triangle is 20cm. if each equal side id double the base find the sides

2
what is "id" in question

what is id

Its a typo, I think it means "is" .

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what is "id" in question

what is id

Its a typo, I think it means "is" .

Log in to add a comment

The answer sholud be :-

equal sides= 8cm

base= 4cm

perimeter = 8 + 8 + 4 = 20cm

equal sides= 8cm

base= 4cm

perimeter = 8 + 8 + 4 = 20cm

Let the lengths of each of two equal sides be 2x.

∴AB = AC = 2x

Also, each equal side is double than the base.

So, BC = x

Now, AB + BC + AC = 20 cm

∴2x + x + 2x = 20

∴5x = 20

∴x = 4cm

Thus,

AB = AC = 2x = 2*4 = 8 cm

BC = x = 4cm