Area and Circumference of Circles

The video tutorial explains how to calculate the area and circumference of a clock using the minute hand as the radius. It also covers finding the area of a sector formed by the clock hands at 2 o'clock, using angle measures and the sector area formula. The tutorial emphasizes the importance of understanding geometric formulas and provides step-by-step guidance for solving these problems.

What is the formula used to calculate the area of a circle?

• pi times diameter squared

• pi times radius squared

• pi times radius times diameter

• 2 times pi times radius

Tags

CCSS.7.G.B.4

If the radius of a clock is 4 inches, what is the area of the clock face?

• 16 pi inches squared

• 12 pi inches squared

• 20 pi inches squared

• 8 pi inches squared

Tags

CCSS.7.G.B.4

What is the formula for calculating the circumference of a circle?

• 2 times pi times radius

• radius times diameter

• pi times radius squared

• pi times diameter

Tags

CCSS.7.G.B.4

If the radius of a clock is 4 inches, what is the circumference of the clock?

• 12 pi inches

• 8 pi inches

• 16 pi inches

• 4 pi inches

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

How many degrees does the minute hand cover at 2 o'clock?

• 120 degrees

• 60 degrees

• 30 degrees

• 90 degrees

Tags

CCSS.HSG.C.B.5

What is the formula for the area of a sector?

• arc measure over 180 times pi times diameter

• arc measure over 360 times pi times radius squared

• arc measure over 180 times pi times radius squared

• arc measure over 360 times pi times diameter

Tags

CCSS.HSG.C.B.5

What is the area of the sector formed by the clock hands at 2 o'clock?

• 2/3 pi inches squared

• 16/3 pi inches squared

• 8/3 pi inches squared

• 4/3 pi inches squared

Tags

CCSS.HSG.C.B.5

What is the decimal approximation of the sector area at 2 o'clock?

• 10.33 inches squared

• 8.33 inches squared

• 9.33 inches squared

• 7.33 inches squared

Tags

CCSS.HSG.C.B.5