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maths C2 doubt

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astarmathsandphysics:
Hence lines are at right angles with the right angle at R

hence St is a diamter
ST=sqrt((-6-2)^2+(1-1)^2)=8
radius =8/2=4
centre at(S+T)/2=((2,1)+(-6,1))/2=(-2,1)

halosh92:

--- Quote from: astarmathsandphysics on February 19, 2010, 05:35:15 pm ---Hence lines are at right angles with the right angle at R

hence St is a diamter
ST=sqrt((-6-2)^2+(1-1)^2)=8
radius =8/2=4
centre at(S+T)/2=((2,1)+(-6,1))/2=(-2,1)

--- End quote ---

thx alot! :D

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