The following part can be considered as sector, except… .

The area of a circle which has radius of 5 cm is ...

Which circumference of circle that has radius of 8 cm?

Given that the diameter for the grey part is 20 cm. At the same picture, there are also 3 congruent white holes with radius of 2 cm. What is the total area for the grey shaded part?

What is the perimeter of the shaded part?

As shown on the picture, a circle has radius of 20 cm. Given that angle of AOB=75 degrees and angle of POQ = 60 degrees , what will be the minor arc length of PB? 

As shown on the picture, a circle has radius of 20 cm. Given that angle of AOB=75 degrees and angle of POQ = 60 degrees,  what will be the area of minor sector of POB?     

Look at the picture below. If the measure of angle OKL = 30 degrees, then the measure of  angle LOK and angle LMK   respectively are ...

Based on the picture,  the measure of angle BAO = 50 degrees and  AB = BC  . What is the measure of angle ACB ?

Based on the picture, the measure of angle CAB = 35 degrees and  AB = BC  . What is the measure of angle AOB?

The radii of two circles are 5 cm and 4 cm. If distance between the center of two circles are 15 cm, what is the length of common internal tangent?

The length of common internal tangent is 12 cm. If the two circles have radii of 3 cm and 2 cm, what will be the distance between the center of those circle?

 The radii of two circles are 13 cm and 6 cm. If distance between the center of two circles are 25 cm, what is the length of common external tangent?

The length of common external tangent is 24 cm. If the two circles have radii of 15 cm and 5 cm, what will be the distance between the center of those circle?