Question

the perimeter of an isosceles triangle is 30cm.the length of its congruent sides is 3cm more than its base . Find the lengths of all sides.​

Answer 1

Step-by-step explanation:

let the length of base be x cm.

then length of one equal side = x + 3 cm

Perimeter = 30cm

then, x + (x+3) + (x+3) = 30

then, x + x + x + 3 + 3 = 30

then, 3x = 30 - 6 = 24

x = 24/3

x = 8

so length of base = 8cm

length of each congruent side = 8 + 3 = 11

Answer 2

Answer:

let the of base is x then the length of congruent side is x+3

Step-by-step explanation:

(x+3) + (x+3) + x = 30

3x + 6 = 30

3x = 30 - 6

3x = 24

x = 8

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