The chord of a circle is 15 cm away from the center.The radius of the circle is 25cm.Find the length of the chord.
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25² =15² + x² ; <== 25 is the radius and 15 is the distance from center to the chord
; it forms a right triangle
x² = 25² - 15² ; <-- normal calculation
x² = 400 ; <-- normal calculation
x=20cm ; <-- so far so good, BUT this is not the answer.
x is the half length of the chord, the full length is twice of it,
20 * 2 = 40 cm. <-- THIS IS THE ANSWER!!
25² =15² + x² ; <== 25 is the radius and 15 is the distance from center to the chord
; it forms a right triangle
x² = 25² - 15² ; <-- normal calculation
x² = 400 ; <-- normal calculation
x=20cm ; <-- so far so good, BUT this is not the answer.
x is the half length of the chord, the full length is twice of it,
20 * 2 = 40 cm. <-- THIS IS THE ANSWER!!
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length of the cord = 20 cm
Answer mine?
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Answer mine?
http://answers.yahoo.com/question/index;…
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25² =15² + x²
x² =25²-15²
x²=400
x=20cm
x² =25²-15²
x²=400
x=20cm