Point P is 25 cm away from the center of a cirle of radius of 7 cm,If PA is tangent to the circle at A find PA

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Point P is 25 cm away from the center of a cirle of radius of 7 cm,If PA is tangent to the circle at A find PA

2007-05-17 13:34:22 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

5 answers

7^2 + x^2 = 25^2
49 + x^2 = 625
x^2 = 576
x = 24

2007-05-17 13:38:32 · answer #1 · answered by Steve A 7 · 0⤊ 0⤋

Draw a radius OA. OA=7cm
OP=25cm
â AOP is a right angle so we have a right triangle with legs of 25 & 7 & the hypotenuse is PA
PA^2=7^2+25^2=49+625=674
PA=â674=25.96 cm

2007-05-17 21:25:56 · answer #2 · answered by yupchagee 7 · 0⤊ 0⤋

PA = sqrt(25^2+7^2) = sqrt (625+49) = sqrt(674) = 25.96 cms

2007-05-17 20:41:15 · answer #3 · answered by Kanatani 1 · 0⤊ 0⤋

PA=24

Edit: As solved above, its an application of the pyth. th

2007-05-17 20:38:47 · answer #4 · answered by rockonvt 1 · 0⤊ 0⤋

I'm already in PA man

2007-05-17 20:36:55 · answer #5 · answered by Anonymous · 0⤊ 1⤋