TRUE or FALSE
1. All radii are congruent.
2. A central angle is an angle whose sides are radii of the circle.
3. The measure of an inscribed angle is half the measure of its intercepted arc.
4. Tangent circles have at least one point in common.
5. An angle inscribed in a seismicircle is a right angle.
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Answer:
1 true
2 false 3true 4 false 5false