Vocabulary And Properties Of Circles
Akopọ
A circle has its own vocabulary: radius, diameter, chord, tangent, arc, sector and segment. Knowing exactly what each word means, and the key property that a tangent meets the radius at a right angle, turns circle problems from confusing to routine.
In this lesson you will learn the parts of a circle and the most useful property for problem solving: a tangent is perpendicular to the radius at the point where they touch. That single right angle is the key to a whole family of exam questions.
Awọn Afojusun
- Use the vocabulary and properties of circles, including that a tangent is perpendicular to the radius at the point of contact.
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- A line that touches a circle at exactly one point is a: A. chord B. diameter C. tangent D. radius Answer: C
- A tangent meets the radius at the point of contact at: A. 45 degrees B. 60 degrees C. 90 degrees D. 180 degrees Answer: C
- The diameter of a circle is: A. half the radius B. equal to the radius C. twice the radius D. the circumference Answer: C
- A tangent from an external point P has OT = 5 and OP = 13. The tangent length PT is: A. 8 B. 12 C. 13 D. 18 Answer: B
- A straight line joining two points on a circle is a: A. tangent B. chord C. sector D. arc Answer: B
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Solve Geometry Applications: Circles and Irregular Figures
Use the properties of circles
"Prealgebra: Solve Geometry Applications: Circles and Irregular Figures" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/prealgebra/pages/9-5-solve-geometry-applications-circles-and-irregular-figures. Access for free at https://openstax.org/books/prealgebra/pages/1-introduction
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