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

Slides:

Advertisements

Similar presentations

10.1 Circles and Circumference

Advertisements

Lesson 16: The Most Famous Ratio of All

Properties of Circles. A circle is the set of all points in a plane that are the same distance from a given point, called the center of a circle. A circle.

10-1 Circles and Circumference. A circle is the set of all points in a plane that are the same distance from a given point, called the center. Center.

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

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 =

Perimeter Rectangles, Squares, and Triangles Perimeter Measures the distance around the edge of any flat object. To find the perimeter of any figure,

1. 2 Circle A circle is the set of all points that are the same distance from a given point called the center.

The outside of the circle is called circumference The circumference is the distance around the circle.

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.

  investigate the relationship between the diameter and circumference of a circle.

Chapter 10 Lesson 1: Circles and Circumference Objective: Learn to find the circumference of circles.

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.

Lesson 11.1 Parts of a Circle Pages Parts of a Circle A chord is a segment whose endpoints are points on a circle. A diameter is a chord that.

10.1 The Circle After studying this section, you will be able to identify the characteristics of circles, recognize chords, diameters, and special relationships.

10.1 Circles. Definition: Although all circles have the same shape, their sizes are determined by the measures of their radii. Two or more coplanar circles.

Circumference and Area: Circles

Circles Honors Math – Grade 4. Circle A circle is a plane figure. All the points on a circle are the same distance from a given point, called the center.

Extension #4A Geometry Math Vocabulary- Circles Assessment Anchor M5.B PA Academic Standard 2.9.5C Aligning with Pennsylvania Department of Education Assessment.

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.

Circles - A reminder.

9-8 Circles and Circumference Course 1 Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day.

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.

Circles. Center Radius Radii Diameter Chord.

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

Warm-Up Find the area: Circumference and Area Circles.

Lesson 8.7 Circumference and Area of Circles Pages

Circumference Lesson #33. What is Circumference? The distance around the outside of a circle is called the circumference (essentially, it is the perimeter.

4-2: Chords and Arcs Unit 4: Circles English Casbarro.

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.

9-8 Circles and Circumference Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day Lesson Quizzes Lesson Quizzes.

SUBMITTED BY ROSHNI B S. Circle is a closed curve in a plane A circle can be drawn with the help of a circular object.

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 Review Grade 5 SOL 5.9 Mrs. Evan, ITRT.

Circles and Amount of Turn

Circle Terminology. Circle The set of points in a plane that are a fixed distance from a given point called the center of the circle.

GEOMETRY Circle Terminology.

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

Parts of a Circle & Circumference Textbook page 516 IAN page 120.

11.6 Surface Area of Spheres Standards: 8.0 & 9.0.

By: Kay McInnis. Diameter DIAMETER is the distance across a circle passing through the center point.

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."

Half the circumference

The midpoint of a circle is centre The line drawn from the centre to the circumference is … radius.

Circles… SOL 6.12 Mrs. Norman John Rolfe Middle School.

Perimeter and Area of Circles and Sectors I CAN -Find the circumference and area of a circle -Find the arc length of a sector -Find the area of a sector.

9.3 Circles Objective: Students identify parts of a circle and find central angle measures.

C IRCLES. &feature=related.

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

Easy as “Pi” By Yamira Hart 6 th Grade Math Maven.

Entry Task Circles and Arcs What is a circle? Circle The set of all points in a plane that are the same distance from a given point (this point.

1)Find the circumference and area of a circle with a diamater of 10 in. Round to the nearest hundredth. Do not forget the units! 2) What would be the radius.

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.

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.

Circles… SOL 6.12 Mrs. Norman John Rolfe Middle School.

Circles and Circumference

Circumference and Area: Circles

Circles and Circumference

Circles and Circumference

Circles and Area.

Lesson 10-1: Circles and Circumference

Presentation transcript:

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

A Chord is a line segment that connects two points on a circle. Y B C D A Chords: AB AC AD

The Diameter of a circle is a special chord that passes through the center of a circle. E B C D A Diameter: AC

The Radius of a circle is a line segment from the center of the circle to any other point on the circle. Y B C D A Radii: YA YC YD (plural form of radius)

diameter radius The length of the radius is one half the length of the diameter. If r = 2 cm, then d = 4 cm. d = 2 x r or r = d ÷ 2 d (diameter) r (radius) If d = 5 in, then r = 2.5 in.

You can use a compass to construct a circle. Step 1: Open the compass to the length of the radius. Step 2: Put the tip of the compass at a point to be the center. Step 3: Rotate the pencil around the center. P compass

The Circumference is the distance around a circle. C (circumference)

The Circumference of a circle is greater than its diameter. It is always the same number of times as great. This number is called pi and is represented by the symbol π. ( π  3.14) You can find the circumference by multiplying π times the diameter. ( C = π x d )

C = π x d = 3.14 x 8 = cm 8 cm E F G d = 8 cm The circumference is cm.

C = π x d C = 2 x π x r = 2 x 3.14 x 3 = in 3 in S T r = 3 in The circumference is in. Remember: d = 2 x r

C = 62 m Find the diameter (d) to the nearest hundredth. C = π x d 62 = 3.14 x d 62 ÷ 3.14 = d d = The diameter is m. diameter

C = 52 in Find the radius (r) to the nearest hundredth. C = π x d 52 = 2 x 3.14 x r 52 = 6.28 x r r = 52 ÷ 6.28 The radius (r) is 8.28 in. C = 2 x π x r radius