Any one want to take a stab at quickly solving these? Thanks.
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- GMAT prep - Geometry.doc
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let angle qrs = s1
also qsr = s1
let angle tsu = s2
also sut = s2
in the rt angle triangle R + T + 90 = 180
therefore R + T = 90
now:
s1 + s2 + x = 180 (1)
2s1 + R = 180 (2)
2s2 + T = 180 (3)
2+3
2(s1+s2) +R + T = 360
therefore s1 + s2 = 135
substitute this in 1 ... calc x.
Hence answer C
-AN
