Question

Only for:-
▪︎Moderators
▪︎Stars
And other best user::
Question:-
The semi- perimeter of a triangle is 10 cm . if one of its side is 5cms and 7 cms respectively then its third side is ​.

Answer 1

Answer:

semi perimeter=10

perimeter=10×2

=20

Step-by-step explanation:

perimeter of triangle= 20 cm

third side= 20 cm - 5+7 cm

= 20 cm- 12 cm

third side = 8 cm

Answer 2

Answer:

Appropriate Question:

• Two sides of a triangle are 5 cm and 7 cm and its semi-perimeter is 10 cm. Then the third side of the triangle is?

Given:

• Semi Perimeter of a triangle is 10 cm.

• Two sides of triangle are 5 cm and 7 cm respectively.

To find:

• The third side of the triangle.

Solution:

➻Let the third side of the triangle be c cm and other sides be a is 5 cm and b is 7 cm respectively.

➻As we know that,

★Semi perimeter = Sum of all sides (a + b + c)/2 ★

⟹ S = 5 + 7 + c/2

⟹ 10 = 12 + c/2

⟹ c = 20 - 12

⟹ c = 8 cm ★

•°• Hence, the third side of the triangle is 8 cm.