Question

4 cm,2.8cm,7.5 cm are the sides of a trangle find the permiter​

Answer 1

Answer:

Answer

⇒ The sum of the lengths of any two sides in a triangle is always greater than the length of the third side in the triangle.

⇒ The differnce of the lengths of any two sides in a triangle is always lesser than the length of the third side in the triangle.

⇒ The difference between 4cm and 7cm is

3cm and their sum is 11cm.

⇒ To ensure that the above mentioned rule is not violated, the possible length of the third side has got to be greater than 3cm and lesser than 11cm.

⇒ So from the given options 6cm is less than

11cm and greater than 3cm

∴ The length of the third side of triangle is 6cm

Answer 2

Answer:

QUESTIONS

1) 4 cm,2.8cm,7.5 cm are the sides of a triangle find the perimeter

SOLUTION

length of one side of triangle = 4cm

length of second side of triangle = 2.8cm

length of third side of triangle= 7.5cm

Perimeter of triangle = ( length of one side + length of second side + length of third side) units

=( 4 + 2.8 + 7.5 ) cm

= 14.3 ( Ans)