Question

the side of a triangle are 3.7 cm and 4.5 cm. if its perimeter is 15 cm find its third side​

Answer 1

Hey!!
Let the third side be X.
Then, perimeter of triangle =sum of its sides
15= 3.7+4.5+X
15=8.2+X
15-8.2=X
So, X=6.8cm
Hence, the third side of the triangle is 6.8cm.

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Answer 2

Answer:

1st side of triangle = 3.7 cm

2nd side of triangle = 4.5 cm

3rd side of triangle = ?

perimeter given = 15

3rd side = perimeter of triangle-(sum of 2 sides )

15= 3.7+4.5+x

15= 8.2+x

15-8.2 = x

6.8= x

hence , 6.8 cm is the 3rd side of triangle

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