Circles

Question 1

Perpendicular bisector

Answer 1

straight line passing through midpoint if a line at a perpendicular angle

Question 2

Chord

Answer 2

Perp bisector of a curve goes through the center of a circle

Question 3

grad of a circle

Answer 3

y1-y2/x1-x2

Question 4

common circle formulas

Answer 4

x^2 + y^2 = r^2

(x+a)^2 + (y+b)^2=r^2

Question 5

Centre of (x+2)^2 + (y+3)^2

Answer 5

(-2,-3)

Question 6

Find centre of circle method

Answer 6

1. Find intersection of 2 perpendicular bisectors.

Question 7

where do 2 perp bisectors meet

Answer 7

center of circle