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Geometry

Use the diagram to answer the question. Triangle A B C. Segment B C measures 13. Segment A C measures 15. Angle B is a right angle.
What is the measure of ∠A?

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  1. Oh my, somebody seriously has to review the basic trig ratios to find that
    sinA = 13/15
    A = arcsin(13/15) = ....

    on my calculator I did
    13 ÷ 15 = ...
    2ndF sin = ...

    or I could have done
    2ndF (13÷15) =

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    Reiny
  2. If you need the specific answer it's 59.997. But if you need the rounded answer then the answer is 60.

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