construct perpendicular bisector. construct line that point z lies in such that zx = zy
construct angle bisector. construct line such that it is equivalent from the line AB and AC
Given 2 lines that are tangent to a circle. To find the centre of the circle.
1. Draw angle bisector for the intersection of the 2 lines
2. Draw perpendicular line through the 2 points of tangent
3. Centre of circle = intersection of the 3 lines
AB and AC are tangents to the to the circle at point X and Y respectively. Find the centre of the circle
Given a partly drawn circle. To complete the circle.
EXAMPLE
Diagram given is part of a circle.
Complete the drawing.
3 properties of perpendicular bisector
2 properties of angle bisectors