find the area of triangle with sides are 10 cm 6 cm and 15 CM
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Answer:
Area of triangle = 20.12305 cm²
Step-by-step explanation:
we know,
area of triangle = √s(s-a)(s-b)(s-c) , where s = (a+b+c)/2
s = 10 + 6 + 15 /2
s = 31/2 = 15.5
area of triangle = √15.5 (15.5 - 10)(15.5 - 6)(15.5 - 15)
= √ 15.5 X 5.5 X 9.5 X 0.5
= √ 155 X 55 X 95 X 5
= √ 5 X 31 X 5 X 11 X 5 X 19 X 5
= X 25 √ 31 X 11 X 19
= √ 6479
= X 80.4922
= 20.12305
therefore area of triangle = 20.12305 cm²
hope it helps...
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