Circle Geometry homework help

lisajanemurphy

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Mar 13, 2014
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1) A circle has centre C.
RS is a chord of the circle.
R is (-1, 6).
Y (2, 3) is a point on RS such that angle CYR = 90 degrees.
Work out the co-ordinates of S.

2) APB is a triangle in a circle.
AB is a diameter.
A is (k, 5)
P is (3, 8)
B is (7, 2)
Work out the value of k.

3) PTQ is a tangent.
T (3, -4) is a point on the circumference of the circle x^2+y^2=25
Work out the equation of the tangent PTQ.
Give your answer in the form y= mx+c

4) A circle intersects the x axis at (-2, 0) and (6, 0).
The centre of the circle is (a, 3).
Work out the equation of the circle.

I AM STUCK ON THESE QUESTION ON MY FURTHER MATHS HOMEWORK. PLEASE ANSWER THESE WILL FULL WORKINGS AND EXPLANATIONS PLEASE, THANKS YOU :)
 
Last edited by a moderator:
Hi Lisa:

What have you been able to do so far, on each of these exercises? That is, where are you stuck? Please show us.

Please also take time to read the forum guidelines; here's a link to the summary page.

(Links for the complete rules and guidelines appear near the bottom of the summary page.)

Thank you! :)
 
1) A circle has centre C.
RS is a chord of the circle.
R is (-1, 6).
Y (2, 3) is a point on RS such that angle CYR = 90 degrees.
Work out the co-ordinates of S.

2) APB is a triangle in a circle.
AB is a diameter.
A is (k, 5)
P is (3, 8)
B is (7, 2)
Work out the value of k.

3) PTQ is a tangent.
T (3, -4) is a point on the circumference of the circle x^2+y^2=25
Work out the equation of the tangent PTQ.
Give your answer in the form y= mx+c

4) A circle intersects the x axis at (-2, 0) and (6, 0).
The centre of the circle is (a, 3).
Work out the equation of the circle.

I AM STUCK ON THESE QUESTION ON MY FURTHER MATHS HOMEWORK. PLEASE ANSWER THESE WILL FULL WORKINGS AND EXPLANATIONS PLEASE, THANKS YOU :)

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http://uk.answers.yahoo.com/question/index?qid=20140313135502AAu667q
 
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