Day seven : Ratio in a Circle
by Nami Youn
Objective
To discover the relationship of ratio of two chords in a circle
To understand the conditions for four points on a cirlcs
1. The relationship of the ratio
of two chords in a circle
Property : If two lines
through a point P meet a circle at points A, A' and B, B', respectively,
then, (PA)(PA') = (PB)(PB')
case 1 P is outside a circle
gsp file
case 2 P is inside a circle
Return to Nami's homepage
Return to Instruction Unit Home