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Lesson 10-1 Vocabulary

Name: ___________________________________
Date: _______________________
Block: ____________
Across
(p. 699) The segment _________ the centers of the two intersecting circles contains the radii of the two circles.
(p. 699) By definition, the _____ C/d is an irrational number called pi (π).
(p. 699) By definition, the ratio C/d is an irrational number called __ (π).
(p. 697) A(n) ______ (plural radii) is a segment with endpoints at the center and on the circle.
(p. 700) A(n) ____________ is a circle that passes through all of the vertices of a polygon.
(p. 700) Using a(n) _____ of 3.14 or 22/7 provides a closer approximation.
(p. 700) Unless stated otherwise, assume that in this text, a(n) __________ with a π key was used to generate answers.
(p. 697) A radius (plural _____) is a segment with endpoints at the center and on the circle.
(p. 699) The _____________ of a circle is the distance around the circle.
(p. 698) ___ circles are similar.
(p. 698) Two circles can __________ in two different ways.
(p. 697) A diameter of a circle is a chord that passes through the center and is made up of _________ radii.
(p. 697) A(n) ______ is the locus or set of all points in a plane equidistant from a given point called the center of the circle.
(p. 697) A(n) _________ of a circle is a chord that passes through the center and is made up of collinear radii.
(p. 700) For the most ________ approximation, use the π key on a calculator.
(p. 698) As with other figures, pairs of circles can be congruent, _______, or share other special relationships.
(p. 699) Circles and circumference are widely used in problems arising in everyday ____, society, and the workplace.
Down
(p.698) Since a diameter d is composed of ___ radii, all diameters of a circle are also congruent.
(p. 697) A circle is the locus or set of all points in a plane equidistant from a given point called the ______ of the circle.
(p. 699) Two formulas for circumference can be _______ by using this definition.
(p. 697) Segments that _________ a circle have special names.
(p. 697) A(n) _____ is a segment with endpoints on the circle.
(p. 698) __________ circles are coplanar circles that have the same center.
(p. 699) If a circle has diameter d or radius r, the circumference C ______ the diameter time pi or twice the radius times pi.
(p. 700) Since π is __________, its value cannot be given as a terminating decimal.
(p. 700) A circle is _____________ about a polygon if it contains all the vertices of a polygon.
(p. 698) Since a circle has many different radii and diameters, the phrases 'the radius' and 'the diameter' refer to lengths rather than ________.
(p. 700) A polygon is _________ in a circle if all of its vertices lie on the circle.
(p. 698) ________ - points that lie in the same plane
(p. 698) All radii r of a circle are _________.
(p. 698) The words radius and diameter are used to describe _______ as well as segments.
(p. 699) If a circle has diameter d or radius r, the circumference C equals the diameter time pi or _____ the radius times pi.
(p. 698) By definition, the distance from the center of a circle to any point on the circle is always the _____.
(p. 698) Two circles are congruent __ and only __ they have congruent radii