F.3 數學題一題(Circle)(with reasons)

👨🏻‍🏫 學術台 數學
2007-01-12 3:49 am
F.3 數學題一題(Circle)(with reasons)
Two equal and parallel chords in a circle of radius 10 cm are 12 cm apart.Find the length of each chord.
更新1:

Supplement: Plane Geometry with reasons This is my homeworkand my teacher won't accapt this.

更新2:

However your answer is correct!!!

回答 (2)

2007-01-12 4:08 am
✔ 最佳答案
Let the equation of the circle be x^2+y^2=10^2
Because the two equal and parallel chords is the same distance between the radius
Therefore x=6 and -6 respectively.
When x=6 and -6,y=8
Therefore the length of the chords are 8 cm x 2=16 cm
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2007-01-12 4:15 am
Let the equation of the circle be x^2+y^2=10^2
Because the two equal and parallel chords is the same distance between the radius
Therefore x=6 and -6 respectively.
When x=6 and -6,y=8
Therefore the length of the chords are 8 cm x 2=16 cm
👍 0 👎 0


收錄日期: 2021-04-23 00:14:41
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