Circle-1_Review

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

• AD

• BD

• CD

• AC

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

• ADB

• BDC

• ADC

• ACB

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

• 10π cm²

• 15π cm²

• 20π cm²

• 25π cm²

Which circumference of circle that has radius of 8 cm?

• 16π cm

• 24π cm

• 32π cm

• 64π 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?

• 12π cm²

• 88π cm²

• 100π cm²

• 112π cm²

What is the perimeter of the shaded part?

• 10π cm

• 20π cm

• 30π cm

• 40π cm

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? 

• 2.5π cm

• 5π cm

• 10π cm

• 20π cm

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?     

• 25π cm²

• 50π cm²

• 100π cm²

• 200π cm²

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

• 90^o and 45^o

• 100^o and 50^o

• 120^o and 60^o

• 150^o and 75^o

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

• 40^o

• 50^o

• 80^o

• 100^o