find the area of triangles two sides of which are 13 cm and 10 cm de permeter is 42 cm​

Question

find the area of triangles two sides of which are 13 cm and 10 cm de permeter is 42 cm​

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Ruby 3 weeks 2021-08-20T09:29:06+00:00 1 Answer 0 views 0

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    2021-08-20T09:30:45+00:00

    Answer:

    4 root 231

    Step-by-step explanation:

    perimeter = 42cm

    two sides are given 10 and 13cm

    third side = 42-13+10 = 42-23 = 19cm

    s = perimeter/2 = 42/2 = 21cm

    area of triangle = s(s-a)(s-b)(s-c)

    = 21(21-10)(21-13)(21-19)

    = 7 * 3 * 11 * 8 * 2

    = 4root 231

    mark it brainiest!!

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