If the sides of a triangle are 8 cm, 10 cm and 12 cm, then it area is
(a)15√7cm^2
(b) 5√7cm^2
(c) √7cm^2
(d) 10√7cm^2
Answers
Answered by
0
Answer:
answer is B) 563−−√sq cm
Description for Correct answer:
Given that,
a=8cm, b = 10 cm and c=12cm
We know, that
s = a+b+c2 = 8+10+122
= 302=15cm
(s-a)=(15-8)=7cm
(s-b)=(15-10)=5cm
(s-c)=(15-12)=3cm
Area = s(s−a)(s−b)(s−c)−−−−−−−−−−−−−−−−−√
= 15×7×5×3−−−−−−−−−−−√= 1575−−−−√= 25×63−−−−−−√
= 563−−√sq cm.
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Answer:
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Step-by-step explanation:
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