Question

The perimeter of an isosceles triangle is 20cm. If each equal side is equal to two times the base, find the sides of the triangle.

Answer 1

Answer:

4 cm, 8 cm, 8 cm

Step-by-step explanation:

Let, the base be x.

So, according to the given condition, the equal sides would have a value 2x.

Given that the perimeter of the isosceles triangle is 20 cm.

The perimeter is the sum of sides, so we can write

2x + 2x + x = 20

→ 5x = 20

→ x = 20/5

→ x = 4 cm.

Now, base is 4 cm so the other two equal sides would be 4 × 2 = 8 cm each.

Answer 2

Answer:

$2x + 2x + x = 20 \\ 5x = 20 \\ x = 20 \div 5 \\ x = 4 \\ 2 \times 4 = 8 \\ 1 \times 4 =4\\ 2 \times 4 = 8 \\ = 20$