Answers
Set 76
- d.Major arcs always need a third letter to distinguish them from
the minor arc that has the same endpoints. ∠y forms major arc
KAI. - a.A circle is a set of points equidistant from a center point.
Congruent circles have points that lie the same distance from two
different center points. Consequently, the radii (the line segments
that connect the center point to the points on a circle) of
congruent circles are congruent. Choices band care incorrect
because they describe secants. Choice ddescribes a chord. - d.Congruent circles have congruent radii; if their radii are
congruent, then their diameters are also congruent. Choice a
describes concentric circles, not congruent circles. - c.Since all of these circles share a radius, they are all congruent
with a radius that is half of the 9 cm diameter of circle A. There
are five radii, each measuring 4.5 cm, from point C to point S,
which means that CS= 5 × 4.5 = 22.5 cm. - b.12 inches is a foot, so •A lies on P. If the distance from •A to
the center point measured less than the radius, then •A would rest
inside P. If the distance from •A to the center point measured
greater than the radius, then •A would rest outside of P. - c.A diameter is a special chord; it is a line segment that bridges a
circle and passes through the center point. - c.As a tangent skims by a circle, it intercepts a point on that circle.
A radius spans the distance between the center point of a circle and
a point on the circle; like a tangent, a radius meets exactly one
point on a circle. - a.Billy acts as the central fixed point of each of these four circles,
and circles with a common center point are concentric.
501 Geometry Questions