If two angles of a triangle measure 60° and 80°, respectively, then the measure of the third angle of this triangle is:
A50°
B40°
C70°
D60°
A50°
B40°
C70°
D60°
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ABCD is a square and APQC is a rectangle. B is a point on PQ. AC-6 centimeter what is the length of AP?