Question

find the perimeter of a triangle ABC having sides of lengths, AB = 7 cm, BC = 5 cm, AC = 8.5 cm. ​

Answer 1

Answer:

perimeter of triangle = sum of all sides

= 7+5+8.5

= 20.5

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Answer 2

Perimeter of triangle = 20.5 cm

Step-by-step explanation:

GIVEN

AB = 7 cm

BC = 5 cm

AC = 8.5 cm

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Formulas Of Triangle

Perimeter of triangle = a + b + c

Area of triangle = ½ × base × height

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We know that,

Perimeter of triangle = a + b + c

Here,

a = 7 cm

b = 5 cm

c = 8.5 cm

___________________________

Perimeter of triangle = a + b + c

Perimeter of triangle = 7 + 5 + 8.5

Perimeter of triangle = 20.5

Perimeter of triangle = 20.5 cm