9h Math

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 10.99 ft

• 12.25 ft

• 8.75 ft

Take 'pi' as 3.14

Find the diameter and the circumference of a circle whose radius is 8cm.

• diameter=8cm and Circumference = 50cm

• diameter = 16cm and Circumference = 50.24cm

• diameter = 4cm and Circumference= 100cm

• diameter = 50cm and Circumference=100cm

The circumference of a circle is equal to 78 inches. What is the radius and the diameter?

• Radius = 12.4 inches Diameter = 24.8inches

• Radius = 6 inches Diameter = 12 inches

• Radius = 5.2 inches Diameter= 10.4inches

• Radius=4 inches Diameter=16inches

Find the circumference of a circle with radius 0.5m rounding your answer to 1 decimal place

• 1.5m

• 1.6m

• 0.8m

• 3.1m

Find the circumference circle with radius 5.5mm

• 34.6mm

• 34.54mm

• 31.4mm

• 17.3mm

The radius of a circle is 20 inches, what is the diameter?

• 10 inches

• 31.4 inches

• 40 inches

• 125.6 inches

The larger sector of the circle is called the

• semicircle

• chord

• minor sector

• major sector

Find the area of the sector, with radius 15cm rounding your answer to 1d.p. Take 'pi' as 3.14

• 176.6cm2

• 156.7cm2

• 23.6cm2

• 88.4cm2

The distance around a tyre is 94.2 m, it's radius is 15 m. If a section is taken from the tyre having an angle of 60 degrees. Calculate the length of the arc for that sector.

• 117.75 m

• 15.7 m

• 12.25 m

• 8.75 m

Find the area of the sector

• 196.65

• 186.59

• 169.56

• 159.45