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Craig S
Craig S asked in Science & MathematicsMathematics · 1 decade ago

how to find the base of a triangle with height & area given?

A triangle with an area of 100cm² has a height of 25cm. Find the length of the base.

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  • Alexis
    Lv 5
    1 decade ago
    Favorite Answer

    the formula for finding the area of a triangle is A=1/2 bxh so since you have the height and area already then the answer is 8.

    Source(s): I am in advanced algebra.
  • ?
    5 years ago

    H=10 B=8 A=1/2b*h A=1/2(8*10) A=1/2(80) A=40

  • §Erraddin§
    1 decade ago

    Well, area of a triangle = 1/2 (heigth times base). So you just have to plug the #'s into that equation:

    100 = 1/2 (25 x base) since multiplying by 1/2 is the same as dividing by 2, you want to do the opposite of that, which is multiplying by 2:

    200= 25xbase Now, divide both sides by 25:

    8=base

    base=8

  • ravi
    1 decade ago

    (area x2)/height

    200/25 = 8

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  • human
    1 decade ago

    A = 0.5BH

    100 = 0.5B25

    100 = 12.5B

    8=B

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