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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

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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

  Is there an error in this question or solution?

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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