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Maths Puzzle
P is a point outside a circle and is 13cm away from its centre. A secant drawn from the point P intersects the circle at points A and B in such a way that PA=9cm and AB=7cm. the radius of the circle is
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- Radius will be 5 cm.....
Draw the figure and apply pythagoras theorem twice - 12 years agoHelpfull: Yes(3) No(2)
- let another secant which passes from p and center
let x and y are the intersect points
it can be solve with a fundamental properties if circle's secant
PA*PB=PX*PY
9*13=(13-R)*(13+R)
calculate it you will find R=5 cm - 12 years agoHelpfull: Yes(3) No(1)
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