In Fig. 6.67, if PQ || ST, ZPQR = 110' and ZRST =
130°, find ZQRS.
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Step-by-step explanation:
draw a line AB from R parallel to PQ and ST
angle on the same side if parallel is 180
one angle =180-110=70
other angle =180-130=50
70+angle QRS+50=180
angle QRS=60°
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