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Earn +20 ptsQ: Is centre required for proving the congruency of two circles?
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How many circles you can draw from one centre?
Multitude
Does a square have a center or do only circles have centers?
A square does have a centre.
What are concertic circles?
Concentric circles - are circles that share a common centre. A typical example - is dripping water into a bowl - where you'll see the ripples form and spread out to the edge of the container.
Do circles have the same center?
No not all circles have the same centre. If the circles formula is in the form x2+ y2=r2 then the centre is always the origin= (0,0). But if the formula for the circle is in the form (x-h)2+(y-k)2= r2 then the centre is the the opposite sign of the h and the k. Eg. (x+4)2+(y-9)2=16 the centre would be (-4,9) and the radius would be 4
When are two circles concentric?
When they have the same centre. As a consequence, the distance between the two circles, along any common radial ray, is a constant.
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