Radian Measure

π is equivalent to how many degrees?

• 180
• 90
• 360
• Mmmm... pie...

π/2 is equivalent to how many degrees?

• 180
• 90
• 60
• Mmmm... pie...

π/4 is equivalent to how many degrees?

• 45
• 90
• 60
• Mmmm... pie...

2π is equivalent to how many degrees?

• 180
• 90
• 360
• Mmmm... pie...

Tags

CCSS.HSF.TF.A.1

What is 0 degrees in radians? 

• 2π 
• 0
• π
•  π/2

Tags

CCSS.HSF.TF.A.1

The length of an arc is 18cm and the radius of the circle is 6cm. What is the radian measure of the central angle?

• 3 radian

• 2 radian

• 4 radian

• 2π radian

Tags

CCSS.HSG.C.B.5

Find the length of an arc that subtends a central angle of measure 3 radians in a circle of radius 5 cm.

• 9 cm

• 15 cm

• 25 cm

• 20 cm

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

• (3,2)
• (-3, -2)
• (-2, -3)
• (2, 3)

Tags

CCSS.HSG.GPE.A.1

In the equation (x+2)²+(y-3)²=4, the radius of the circle is...

• 4
• 2
• 3
• 16

Tags

CCSS.HSG.GPE.A.1

In a​ circle with an area 64π in². What is the area of a sector formed with a central angle of 90^o?

• 16 $\pi$

• 32 $\pi$

• 64 $\pi$

• 128 $\pi$