If you are given the diameter, how can you calculate the radius?

Which of the following is the chord?

What is the formula for circumference of a circle given the diameter?

What is the circumference of this circle?
(Use π = 3.14)

How do you find the area of a circle?

The diagram shows a circle with centre O. Given OF = 6.5 cm and EG = 5 cm, calculate the area of the shaded region, in $cm^2$  . Give answers correct to two decimal places. (Use  $\pi$  = 3.142)

What is the longest chord in a circle?

Calculate the area of a circle with a circumference of 47.13 cm. (Use  $\pi$  = 3.142)

What is the part of a circle which enclosed by two radii and an arc?

The diagram shows a rectangular piece of land owned by Encik Rashid. Encik rashid divided his land into 3 parts. The first part is a triangle KLM. K is the midpoint of JL and M is the midpoint of LN. The second part is semicircle. Encik Rashid intends to plant vegetables in the first and second part. Calculate the area that is not planted with vegetables (Use  $\pi$  = 3.142)