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1. which of the following is the center of the given circle?
A. S
B. R
C. T
D. M

2. If SM measures 100°, what is the measure of ST?
A. 30°
B. 60°
C. 80°
D. 90°

3. If TM = 8 cm, then AR = ____
A. 16 cm.
B. 8 cm.
C. 4 cm.
D. 2 cm.​