Lesson: 10 – 1 Circles and Circumference

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Presentation transcript:

Lesson: 10 – 1 Circles and Circumference Geometry Lesson: 10 – 1 Circles and Circumference Objective: Identify and use parts of circles. Solve problems involving the circumference of a circle.

Circle A set of points in a plane equidistant from a given point called the center.

Segments in a Circle Copy

Name the circle, a radius, a chord, and a diameter of the circle.

Radius and Diameter

16 in 7 ft 11 m

Circle Pairs

Circle Pairs Copy all

How can 2 circles intersect?

15 9 Find RC.

Copy formula Circumference The distance around a circle.

Find the circumference of each circle described Find the circumference of each circle described. Round to the nearest hundredth.

Find the diameter and radius of a circle to the nearest hundredth if the circumference is 106.4 mm. First!

Quadrilateral LMNP is inscribed in the circle. Circle K is circumscribed about Quad. LMNP.

Do not plug into a calculator Draw a picture. Find the hypotenuse (diameter). Find the circumference. 9 Do not plug into a calculator since it said “exact”

Homework Pg. 687 1 – 8 all, 10 – 32 E, 50