1. For a geometry project, Mr. Smith asked his students to givelthe most precise definition for a circle. Which student gave the most precise definition? A. The set of all points in a plane that are equidistant from a given center point. B. A set of points that are equal distance from a center point. C. A polygon in a plane that has no angles. D. A figure that is 360° and has a diameter. 2. Quadrilateral QRST is inscribed in the circle as shown above. Which of the following would be used to find the m L 7? R 6. A. 90° + m L 5 B. 180° + m L 5 C. 180° - m L 5 a5 7 1s D. m L 7= m L 5 T
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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