Question

5) The perimeter of an isosceles triangle is 10 cm. If one of its equal sides is 2cm, find the third side.

.pls help​

Answer 1

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$\huge\sf\green{perimeter}$

In Isoceles triangle two sides are equal Perimeter = 10cm

One of its equal side is 2 cm.... therefore, two opposite sides are = 2 cm Let , the third side be a .

Perimeter of a triangle = sum of its sides 10cm= 2+2 + a

10-4=a

6 = a

so, length of the third side is 6 cm.

$\huge\sf\pink{answered by Priya}$

Answer 2

Answer:

Third side = 6 cm

Step-by-step explanation:

Given:

• Perimeter of isosceles triangle = 10 cm
• One of its 2 equal sides = 2 cm

To find:

Third side = ?

Solution:

The perimeter of any figure is defined as the sum of all sides.

In this question,

Perimeter of isosceles triangle = 2 (equal sides) + Third side.

Substitute the given values.

⇒ 10 = 2 (2) + Third side

⇒ 10 = 4 + Third side

⇒ Third side + 4 = 10

⇒ Third side = 10 - 4

⇒ Third side = 6 cm

∴ Third side of the isosceles triangle = 6 cm