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18. What is an angle whose vertex is on a circle and whose sides contain the chords of a
circle?
A. central angle
C. circumscribed angle
B. inscribed angle
D. intercepted arc

19. It is an angled form by two rays whose vertex is the center of the circle.
A. Inscribed angle
B. Central angle
C. Vertical angle
D. Congruent angle

20. Which of the following is the degree measure of a semicircle?
A 360°
B. 90°
C. 180°
D. 45°

21. It is a line that intersects a circle at exactly two points.
A. Line segment
B. Tangent line
C. Secant line
D. Perpendicular line

22. It is a line that intersects a circle at exactly one point.
A. Line segment
B. Tangent line
C. Secant line
D. Perpendicular line

23. In a circle, a diameter bisects a chord and an arc with the same endpoints if and only
if it is to the chord
A. perpendicular
B. parallel
C. tangent
D. secant