trig

Please answer b)only

a) If a triangle has angles of 35 and 65 degrees, what is the measurment of the third angle? Is it a right triangle?
b)Find all angles of a right triangle triangle RST given that r = 18 cm and s = 20 cm

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  1. see my reply below in

    http://www.jiskha.com/display.cgi?id=1208400886

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    posted by Reiny
  2. yes, the sum of angles is 180 in triangle.
    b. you know the third side (PYTH theorm). You can find angles from sin, cosine.

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