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rahesh
rahesh asked in Science & MathematicsMathematics · 1 decade ago

answer this math question and get 10 points?

The pitch of a roof is the rise divided by the run.if the pitch is greater than 1.0 but less than 1.6, roofers use planks fastened to the roof to stand on when shingling it. If the pitch is greater than 1.6, scaffolding is needed.For each roof angle, what equipment (scaffolding or planks),if any would roofers need?

a) 34degree b) 60degree c) 51degree

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2 Answers

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  • statman
    Lv 6
    1 decade ago
    Favorite Answer

    Rise/run is the tangent of the angle.

    a) tan(34°) = 0.6745 -- no equipment needed

    b) tan(60°) = 1.7321 -- scaffolding needed

    c) tan(51°) = 1.2349 -- planks needed

  • goober
    Lv 7
    1 decade ago

    arctan 1.6 = 58 degrees

    a) Planks

    b) Scaffold

    c) Planks

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