Circles and Parts

What transformations can be used to show circles I and J are similar?

• Dilate circle I about (4, 10) with scale factor 1/2 and then translate down 4 and left 6.

• Translate circle J right 4 and up 6 and then dilate about point (4, 10) with a scale factor 1/2

• Translate circle J left 6 and down 4 and then dilate about point (4, 10) with scale factor 2.

• Dilate circle I about (4, 10) with scale factor 1/2 and then translate left 4 and down 6.

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

How many degrees are in a circle?

• 90

• 180

• 270

• 360

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Which is true of a minor arc?

• It forms half a circle.

• It forms a whole circle.

• It measures greater than 180 degrees. 

• It measures less than 180 degrees.

Tags

CCSS.HSG.C.B.5

Which of the following would be a major arc in the diagram?

• BC

• BCD

• CD

• AB

What is this called?

• Chord

• Minor arc

• Secant

• Diameter

What is this called?

• Tangent Line

• Secant

• Chord

• Diameter

The place where the tangent line touches the circle is called the

• Point of Tangerine

• Point of Transparency

• Point of Tangency

• Point of Tangential

Circles X and Y have a similarity ratio of 1/2. Which of the following could NOT be true about the circles?

• Circle X has a radius of 5 while Circle Y has a radius of 10.

• Circle X has a circumference of 15π and Circle Y has a circumference of 30π.

• Circle X has a radius of 12 while Circle Y has a radius of 6.

• Circle X has a circumference of 60π while Circle Y has a circumference of 20π.

Tags

CCSS.7.G.A.1

Proving which pair of circles to be similar would involve a scale factor of 2 and a translation of right 10 and down 2?

• Circle L to Circle M

• Circle K to Circle L

• Circle K to Circle M

• Circle N to Circle L

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

The line segment between the center and a point on the circle

• Radius

• Diameter

• Chord

• Tangent