Introduction to right triangle:

 A right triangle or right-angled triangle is a triangle in which one angle is a right angle. The side opposite the right angle is called the hypotenuse (side c). The sides adjacent to the right angle are called legs. Side a may be identified as the side adjacent to angle B and opposed to angle A, while side b is the side adjacent to angle A and opposed to angle B.

 

 

 

Perimeter formula of right triangle:

 

The perimeter of a shape is out side distance of that shape. To find the perimeter of a shape, take the sum of the length of each side. In right triangle, the perimeter can be calculated by adding the three side length of triangle.

Formula to find perimeter:

Perimeter of the triangle = sum of three side length of triangle.

                                      P= a + b + c.

 

Example problems:

 

1. The three sides of right triangles are 12cm, 5cm and 13 cm. find the perimeter of the triangle.

Solution:

Given:

Three side length 12cm, 5cm and 13 cm.

Formula:

Perimeter of the right triangle (p) =a + b + c

                                                     =12 + 5 + 13

                                                     =30

Perimeter of the right triangle (p) =30 cm

 

2. The three sides of right triangles are 12m, 10m and 6.6 m. find the perimeter of the triangle.

Solution:

Given:

Three side length 12cm, 10cm and 6.6 cm.

Formula:

Perimeter of the right triangle (p) =a + b + c

                                                     =12 + 10+ 6.6

                                                     =28.6

Perimeter of the right triangle (p) =28.6cm

 

3. The three sides of right triangles are 5.8cm; 5cm and 3 cm. find the perimeter of the triangle.

Solution:

Given:

Three side length 5.8cm, 5cm and 3 cm.

Formula:

Perimeter of the right triangle (p) =a + b + c

                                                     =5.8 + 5 + 3

                                                     =13.8cm

Perimeter of the right triangle (p) =13.8cm

 

 

Practice problem in right triangle:

1. Find the perimeter of the triangle, its sides length are 11.66 m, 6m and 10m.

  Answer: Perimeter: 27.66m

2.  Three sides of right triangles are 12 feet, 14 feet and 18.4 feet. Find perimeter of triangle.

  Answer: Perimeter: 44.4 feet