Question

10. Find the perimeter of a triangle of whose two sides are equal and 25 cm long and the third side is 36 cm long.
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Answer 1

Perimeter of the given triangle = Addition of all the given sides

= 25 + 25 + 36

= 86 cm

Answer 2

Answer :-

Perimeter of Triangle = 86 cm

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To Find :-

• The Perimeter of Triangle.

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Given :-

• Length of two equal sides = 25 cm

• Length of the third side = 36 cm

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Concept :-

The question is about triangle whose 2 sides are equal and 1 side is different.

If the 2 sides of a triangle are equal and the third side of a triangle is not equal to other 2 equal sides of a triangle then the triangle is called as isosceles triangle.

Perimeter Of Isosceles Triangle = 2a + b

Here,

a = equal side

b = unequal side

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Step By Step Solution :-

☆ Perimeter of a Triangle = Sum of all the sides of a Triangle .

So Perimeter =>

$\implies25 + 25 + 36 \: cm \\ \\ \implies50 + 36 \: cm \\ \\ \implies86 \: cm$

Therefore Perimeter = 86 cm

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Extra Formulas :-

• Perimeter of Rectangle = 2 ( L + B )

• Perimeter of Square = 4 × Side

• Perimeter of Triangle = Sum of all the sides

• Circumference of Circle = 2πr

• Area of Square = Side²

• Area of Rectangle = Length × Breadth

• Area of Circle = πr²

• Area of Triangle = 1/2 base × height

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