In triangle ABC, angle A is 50 degrees and angle B is 70 degrees. What is the measure of angle C?
A 40 degrees
B 60 degrees
C 70 degrees
D 50 degrees
SAMPLE 2
A triangle is placed on top of a rectangle. The triangle has angles 40 degrees and 60 degrees at its base. The rectangle has a right angle. What is the sum of all marked angles in the figure?
A 180 degrees
B 90 degrees
C 360 degrees
D 270 degrees
SAMPLE 3
A right-angled trapezium has three angles measuring 90 degrees, 90 degrees, and 60 degrees. What is the measure of the fourth angle?
A 100 degrees
B 110 degrees
C 120 degrees
D 130 degrees
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