Geometry question

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  1. #1
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    Geometry question

    Hi!

    May I ask you for help?
    What I have is :
    The triangle has sides 16, 21, and 20 ft.
    How many square feet in the triangle? Round to nearest square foot.
    I ried to use Arbitrary triangle calculator here:
    Arbitrary triangle calculator
    I've got:
    Area=150.70148473058
    Seems like it is the right answer, because textbook shows me 151ft.
    But I want to understand the way of solving it.
    Please show me step by step solution and the formula.

    Thanks in advance!

  2. #2
    and the hat of wrongness Salem's Avatar
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    Like this?
    https://duckduckgo.com/?q=area+of+a+...&kl=uk-en&kh=1

    I'm wondering how you found that site, without doing a similar kind of search to begin with.
    In which case, why are you asking, when you've already searched.
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  3. #3
    TEIAM - problem solved
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