Congruent Circles- two circles with the same radius. Diameter – A segment that goes through the center of the circle, with both endpoints on the edge of the circle. Chord - A line segment that goes from one point to another on the circle's circumference. Tangent – a line that intersects a circle at only one point.
Circumference of a circle is simply C = πd, d = diameter.
now, we know the diameter is 80, so C = π80, or just 80π.
Answer:
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Step-by-step explanation:
