How to Use the Perimeter of a Triangle Formula to Solve Math Questions

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Triangle

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Perimeter

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Perimeter of a Triangle

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The sum of the measures of the angles of a triangle is 180 degrees.

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Triangles are classified into three types

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Equilateral Triangle

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Perimeter of an Equilateral Triangle

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Example

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Isosceles Triangle

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Isosceles Triangle

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Perimeter of an Isosceles Triangle

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Example

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Scalene Triangle

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Perimeter of Scalene Triangle

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Example

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How to Use the Perimeter of a Triangle Formula to Solve Math Questions

Triangle

A polygon with three sides is called a triangle.

Triangle having - 3 sides - 3 angles - 3 vertices

Perimeter

Perimeter is defined as the total length of a boundary of an object.

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Perimeter of a Triangle

The sum of the measures of all the sides is called the perimeter of a triangle.

Perimeter of a triangle = sum of all the sides

The sum of the measures of the angles of a triangle is 180 degrees.

Triangles are classified into three types

1. Equilateral triangle 2. Isosceles triangle 3. Scalene triangle

Equilateral Triangle

A triangle whose sides are equal in length is called an equilateral triangle.

Perimeter of an Equilateral Triangle

Perimeter of an equilateral triangle = 3 x side

Example

Find the perimeter of an equilateral triangle whose side is 4cm.

Isosceles Triangle

A triangle in which two sides are equal in length is called an isosceles triangle.

Isosceles Triangle

In an isosceles triangle the unequal side is called the base of the triangle.

The base angles of an isosceles triangle are equal

Perimeter of an Isosceles Triangle

Example

What is the perimeter of an isosceles triangle whose sides are 6cm and 9cm.

Scalene Triangle

If no two sides are equal in length then it is called a scalene triangle.

Perimeter of Scalene Triangle

Example

Find the perimeter of a scalene triangle whose sides are 10cm, 2cm and 14cm.