Circles – Segments and Circumference Circle – The set of all points in a plane a given distance from a given point (the center). Circles are named by their.

Slides:

Advertisements

Similar presentations

C=π d C=2πr r=½d d=rx2 A=πr² The diameter is the longest chord. The ratio of the circumference is always …. π is a Greek letter. π can also.

Advertisements

10.1 Circles and Circumference

Using Formulas in Geometry

Using Formulas in Geometry

M5G2 – Students will understand the relationship of the circumference of a circle, its diameter, and pi (pi ≈ 3.14)

Using Formulas in Geometry

Circles 9.3 Page 532 DiameterIs a segment that passes through the center of the circle and has endpoints on the circle. Segment AC is the diameter. D =

9.1 – 9.2 Exploring Circles Geometry.

3.4 Area and Circumference 1 Circle A circle is a plane figure that consists of all points that lie the same distance from a fixed point. The fixed point.

11.4: Circumference and Arc Length Objectives: Develop and apply the equation for the circumference of a circle Determine arc length of a circle Common.

Target Apply formulas for perimeter, area, and circumference.

Circles and Circumference Lesson 9-5. Vocabulary A circle is a plane figure that consists of a set of points that are equidistant from a given point called.

Circles and Circumference. Vocabulary A circle is a plane figure that consists of a set of points that are equidistant from a given point called the center.

10-1 Circles Page 697. A circle is the set of all points in a plane that are a given distance from a given point in that plane. The given point is the.

Section Using Formulas in Geometry Holt McDougal Geometry

Transparency 2 Click the mouse button or press the Space Bar to display the answers.

A Circle is a closed plane figure in which all the points are the same distance from the center. F Center Circle F.

10-5 Circles Course 1 Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day.

- Segment or distance from center to circle. Objective - To find the circumference of a circle. Circle - The set of points that are equidistant from a.

Chapter 10: Circles.

Objective Apply formulas for perimeter, area, and circumference.

Objective Apply formulas for perimeter, area, and circumference.

Circumference and area of circles Pick up your calculator for today’s notes.

A circle is a closed curve in a plane. All of its points are an equal distance from its center.

Mrs. Planavsky 4 th Grade.  Find the circumference of a circle  Find the measurement of a diameter of the circle.

SPI I CAN identify parts of a circle. I CAN find the circumference and area of a circle.

Warm Up The length and width of a rectangle are each multiplied by 5. Find how the perimeter and area of the rectangle change. The perimeter is multiplied.

Geometry Chapter 9 Section 1 Circles. Circle The set of all points in a plane that are a given distance from a center point Radius a line segment from.

Geometry Warm Up CIRCLES AND ARCS Objective: To find the circumference and arc length.

Warm Up Evaluate. Round to the nearest hundredth

Circles and Circumference. Vocabulary A ________is a plane figure that consists of a set of points that are equidistant from a given point called the.

Circles and Amount of Turn

Standard: M.3.G.2 M.3.G.4.  Center:  Radius: A line segment drawn from the center to any point on the circle  Diameter: A line segment drawn across.

9-1 Exploring Circles Objectives: To identify and use parts of circles. To solve problems involving the circumference of a circle.

By Renikki Alexander IDT 7062 Let’s Listen to the Circle Song "πr 2 sounds like area to me and when I need circumference I'll use πd."

10.1 Circles and Circumference. Objectives Identify and use parts of circles Identify and use parts of circles Solve problems using the circumference.

Notes Over 3.3Circles The circumference of a circle is the distance around the circle. Example Find the circumference of a circle with a diameter of 5.

Lesson 10-1 Introduction to Circles. Circles - Terms y x Chord Radius (r) Diameter (d) Center Circumference = 2 πr = dπ 0° 180° 90° 270°

Do Now:. Circumference What is circumference? Circumference is the distance around a circle.

CIRCLES Lesson 9-6. Circles A circle is a set of points that are the same distance from a given point, called the center.

Holt Geometry 1-5 Using Formulas in Geometry Warm Up Evaluate. Round to the nearest hundredth () 6. (3) 2.

Holt McDougal Geometry 1-5 Using Formulas in Geometry 1-5 Using Formulas in Geometry Holt Geometry Warm Up Warm Up Lesson Presentation Lesson Presentation.

CIRCLES AND CIRCUMFERENCE. CONTINUATION OF PI DAY In every circle, the ratio of the circumference to the diameter is equal to …… The Greek letter.

11-1 Parts of a Circle. Goal Identify segments and lines related to circles.

10.1 Circle and Circumference Then: You identified and used parts of parallelograms Now: 1. Identify and use parts of circles. 2. Solve problems involving.

10.1 Circles and Circumference

Warm Up Evaluate. Round to the nearest hundredth

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Objective Apply formulas for perimeter, area, and circumference.

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Using Formulas in Geometry

Happy Friday!!! Please take out some paper to take notes on today lesson. Be ready to begin class when the bell rings.

Using Formulas in Geometry

Using Formulas in Geometry

Circles and Circumference

Circles and Circumference

Lesson 10-1: Circles and Circumference

Presentation transcript:

Circles – Segments and Circumference Circle – The set of all points in a plane a given distance from a given point (the center). Circles are named by their center point. Concentric circles – Circles in the same plane with the same center.

Circles – Segments and Circumference Radius – Any segment with endpoints that are the center of a circle and a point on the circle. Chord – A segment with two endpoints on the circle. Diameter – A chord that passes through the center.

Circles – Segments and Circumference Pi (  ) – An irrational number that is defined as the ratio of the circumference to the diameter of a circle. (C/d =  ) Circumference – The distance around a circle. Represented by either: C =  d or C = 2  r

Example 1-1e Answer: a. Name the circle. b. Name a radius of the circle. c. Name a chord of the circle. d. Name a diameter of the circle. Answer:

Example 1-2d Answer: 58 Answer: 12.5 a. If BG = 25, find MG. b. If DM = 29, find DN. Circle M has diameters c. If MF = 8.5, find MG. Answer: 8.5

The diameters of, and are 5 inches, 9 inches, and 18 inches respectively. a. Find AC. b. Find EB. Example 1-3e Answer: 6.5 in. Answer: 13.5 in.

a. Find C if r = 22 centimeters. b. Find C if d = 3 feet. c. Find d and r to the nearest hundredth if C = 16.8 meters. Example 1-4e Answer:

Example 1-5d Answer: C Find the exact circumference of. A B C D