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​

Question

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​

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Iris 1 month 2021-08-21T13:26:57+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-21T13:28:10+00:00

    Answer:

    lolll

    Step-by-step explanation:

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    0
    2021-08-21T13:28:56+00:00

    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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