Question

find the third sides of triangle
4cmand7cm perimeter =20​

Answer 1

Answer:

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Perimeter of triangle = 1st side + 2nd side + 3rd side

20 = 4 + 7 + 3rd side

20 = 11 + 3rd side

20-11 = 3rd side

9 = 3rd side

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Step-by-step explanation:

Answer 2

the third side is 9 cm

perimeter formula=side + side + side

then given two side are 4cm and 7 cm

then ,

let x be the length of the third side

then,

4+7+x=20

11+x=20

x=20-11

x=9cm

given triangle is an scalene triangle