Laurelle's answer to LockB's Secondary 3 A Maths Singapore question.
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not sure if this will help but,
the general form of a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle. this general form is in completed square form. i guess what the worked example general form means that when u expand the completed square form. to find the radius just make r the subject. i only learnt this in JC though
hope this helps!
the general form of a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle. this general form is in completed square form. i guess what the worked example general form means that when u expand the completed square form. to find the radius just make r the subject. i only learnt this in JC though
hope this helps!
Date Posted:
4 years ago
oh and the coordinates of the centre of the circle are (a, b). it's like solving for the value of x.
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