Pi and the Circumference &Area

Question 1

If the circle has a diameter of 12cm. what is the circumference

Answer 1

What You do Is ( Pi times the radius)

And if it has 5.54837578 see if it says to the nearest decimal if not put it to 1 decimal place

Question 2

How do you find the circumference if the its a half circle

Answer 2

You do it by ( 2 times Pi times (lets say 5) plus 5 equals
Which equals something.
Same thing with other question if it has decimals

Question 3

How do you find the circumference if its a 1/4 of a circle

Answer 3

You do ( 1/4 times 2 times Pi time (lets say 6) plus 6 plus 6 equals ....
Same with decimals on other cards

Question 4

How do you find the area of a circle if the radius if 4cm

Answer 4

You do Pi time 4 squared which equals 50.3cm

Question 5

How do you do it if it has a diameter of 10cm

Answer 5

You half it so it would be 5cm

Question 6

How do you do the area of half a circle ( 12cm)

Answer 6

You half it so it would be 6cm then you do( 1/2 times Pi times 6) which equals 56.5cm

Question 7

How do you ding the area of a sector

Answer 7

You do Area equals = fraction/360 times Pi times 6 squared