How are the semicircle and the diameter of a circle related?

A. The length of the diameter and the length of semicircle are the same.
B. The degree measure of the diameter and the degree measure of the semicircle are the same.
C. The angle measure of the diameter is twice the angle measure of the semicircle.
D. The angle measure of the diameter is half the angle measure of the semicircle.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b. false

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