Circle in Mathematics

A region bounded radii and an arc is called

• quadrant

• segment

• sector

• major segment

A circle has a radius of 5 cm. What is the circumference of the circle?

• 10𝜋 cm

• 20𝜋 cm

• 25𝜋 cm

• 5𝜋 cm

If the circumference of a circle is 16𝜋 cm, what is the diameter of the circle?

• 8cm

• 4cm

• 32cm

• 16cm

What does A represents in the figure given ?

• Center

• Radius

• Circumference

• diameter

What the names of radius?

• AB,CO

• AO,BO,CO,DO

• CD,CO

• AB,BC,CD

A circle has a radius of 10 cm. What is the area of a sector with a central angle of 90 degrees?

• 25𝜋 cm²

• 50π cm²

• 75π cm²

• 100π cm²

A circle has a radius of 8 cm. What is the length of an arc that subtends a central angle of 45 degrees?

• 4π/3​ cm

• 8π​/3 cm

• 2π​/3 cm

• 16π​/3 cm