Core 2

Question 1

How do you work out the length of an arc?

Answer 1

Rø (theta) -in radians

Question 2

What is the area of a sector?

Answer 2

1/2r^2ø (theta) -in radians

Question 3

How do you find the equation of a circle?

Answer 3

(x-h)^2+(y-k)^2=r^2

With (h,k) being the centre and r being the radius.

Question 4

How do you find the length of a line?

Answer 4

Find the difference of the X and y coords, square them and add together. Then square root.

Question 5

How do you find the midpoint of a line?

Answer 5

To find the X coord, you add the two and halve. Repeat for the y coord.