SSC (English Medium) Class 8Maharashtra State Board
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# Sides of a Triangle Are Cm 45 Cm, 39 Cm and 42 Cm, Find Its Area. - SSC (English Medium) Class 8 - Mathematics

ConceptArea of a Triangle by Heron’S Formula

#### Question

Sides of a triangle are cm 45 cm, 39 cm and 42 cm, find its area.

#### Solution

a = 45 cm
b = 39 cm
c = 42 cm

s = ("a" + "b" + "c")/2 = (45 + 39 + 42)/2 = 63

Area = sqrt[s (s -a) (s-b) (s - c)]

= sqrt[63  (63 -45) (63 - 39) (63 - 42)]

= sqrt[63 xx 18 xx 24 xx 21]

= 756 cm²

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#### APPEARS IN

Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 15: Area
Practice Set 15.4 | Q: 1 | Page no. 101
Solution Sides of a Triangle Are Cm 45 Cm, 39 Cm and 42 Cm, Find Its Area. Concept: Area of a Triangle by Heron’S Formula.
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