Unit Circle (3B): Introduction (circle review)

Presentation

•

Mathematics

•

11th Grade

•

Easy

•

CCSS

7.G.B.4, HSG.C.A.2, HSF.TF.A.2

Standards-aligned

Fabian Manning

Used 5+ times

FREE Resource

11 Slides • 15 Questions

Unit Circle:

Review-Parts of the Circles

Lesson Objective:

To enable students to become familiar with the unit circle
To use the unit circle to evaluate the trigonometric functions sin, cos and tan for all angles

DEFINITION: a line that goes from the center of the circle to any point on the circle

FORMULA: Radius = Diameter divided by 2

Unit 4B - Circles - Math 7

RADIUS

DEFINITION: A straight line that goes from one side of a circle to the opposite side AND through the center of the circle.

FORMULA: Diameter = Radius x 2

Unit 4B - Circles - Math 7

DIAMETER

Unit 4B - Circles - Math 7

CIRCUMFERENCE

Dropdown

A line that goes from the center of the circle to any point on the circle is called a

Dropdown

A straight line that goes from one side of a circle to the opposite side AND through the center of the circle. is called

Dropdown

The distance around the outside of the circle is called

Open Ended

Based on the diagram shown, how much radius makes a diameter?

Type response here

DEFINITION: a ratio between the circumference and the diameter of a circle. It is approximately 3.14

FORMULA: Circumference divided by diameter

Edpuzzle

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Dropdown

The number of times that a

can fit around a circle's

is called

. There are approximately

diameters that can fit within the circumference of a circle.

Multiple Choice

What is a straight line that goes through the center of a circle from one side to the opposite side?

Diameter

Circumference

Radius

Center

Multiple Choice

Does this picture show the diameter or radius of a circle?

Diameter

Radius

Multiple Choice

What is the line that goes from the center of a circle to any point on the circle?

Diameter

Circumference

Chord

Radius

Multiple Choice

Is the red line the radius or the diameter of the circle?

Radius

Diameter

Multiple Choice

Is the red line the radius or the diameter of the circle?

Radius

Diameter

Multiple Choice

Is the red line the radius or the diameter of the circle?

Radius

Diameter

Multiple Choice

What is the radius of the circle?

Multiple Choice

What is the diameter of the circle?

Multiple Choice

What is the diameter of the circle?

5 inches

10 inches

3.14 inches

15.84 inches

The lesson on circle review is Complete!

We will next study the Unit Circle

Open Ended

Conduct a short Google search on the Unit Circle and write one thing you understand about unit circles.

Type response here

Unit Circle:

Review-Parts of the Circles

Lesson Objective:

To enable students to become familiar with the unit circle
To use the unit circle to evaluate the trigonometric functions sin, cos and tan for all angles

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