Question

Help me for 20 points.

Answer 1

1.  Find angle Y.  Since the interior angles of a triangle must add up to 180 deg., we have 180 - (98+24) = 58 deg.

Apply the Law of Sines to determine the lengths of sides r and t:

    r           7.9            t
--------- = --------- = ---------
 sin 98     sin 58     sin 24

Then r = (7.9 sin 98)/ (sin 58) = 9.22.  This matches r in the 2nd choice.  Determine t using the same method:  t = 7.9sin 24 / sin 58.

Does your t value match that in the 2nd possible answer?