- #1

david13579

- 20

- 0

Is that a correct way of doing it?. Even if it is correct, not many people would remember the chord length formula so I doubt our professor intended for it to be solved that way. There has to be an easier way to do it.

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- Thread starter david13579
- Start date

- #1

david13579

- 20

- 0

Is that a correct way of doing it?. Even if it is correct, not many people would remember the chord length formula so I doubt our professor intended for it to be solved that way. There has to be an easier way to do it.

- #2

Delphi51

Homework Helper

- 3,407

- 11

To find the height, I drew a horizontal line from A to the vertical line.

The distance from the center of the circle to the line is 30*cos(40) = 23.

So the height at A is 30 - 23 = 7.

I get the same final answer answer you did.

- #3

david13579

- 20

- 0

To find the height, I drew a horizontal line from A to the vertical line.

The distance from the center of the circle to the line is 30*cos(40) = 23.

So the height at A is 30 - 23 = 7.

I get the same final answer answer you did.

Wow, this is more straight forward. I don't see how I see it myself.

This is what I mean by chord length . http://i.imgur.com/aNTUA.png

Thanks :)

- #4

Delphi51

Homework Helper

- 3,407

- 11

Fascinating! I must attempt to derive that formula.

Funny, I never ran across it before.

Funny, I never ran across it before.

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