Question

Q3: Find the perimeters of a triangle whose sides are as follows:
(i) 15m, 18m, 20m.
(ii) 42cm, 38cm, 56cm.​

Answer 1

Answer:

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Step-by-step explanation:

1.Perimeter =15+18+20=53m

2.Perimeter =42+38+56=136m

Answer 2

1) Perimeter of triangle = 53 m

2) Perimeter of triangle = 136 cm

Step-by-step explanation:

1)

GIVEN

AB = 15 m

BC = 18 m

AC = 20 m

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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

Perimeter of triangle = 15 + 18 + 20

Perimeter of triangle = 53

Perimeter of triangle = 53 m

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2)

GIVEN

AB = 42 cm

BC = 38 cm

AC = 56 cm

___________________________

We know that,

Perimeter of triangle = a + b + c

Perimeter of triangle = 42 + 38 + 56

Perimeter of triangle = 136

Perimeter of triangle = 136 cm