Question

TWO SIDES OF A TRIANGLE ARE 8 CM AND 5CM AND THE PERIMETER OF THE TRIANGLE IS 20 CM FIND THE THIRD SIDE OF THE TRIANGLE ​

Answer 1

Answer:

7 CM

Step-by-step explanation:

LET THE UNKNOWN SIDE = X

8 + 5 + X = 20

13 + X = 20

X = 20 - 13

X = 7

Answer 2

Answer:

Let the 3rd side be x.

Perimeter of triangle = Sum of all sides

20 = 8 + 5+ x

20 - 13 = x

x = 7 cm

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