7 items are filed under this topic.
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Find the central angle |
2009-08-18 |
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From Larissa:
In a circle, the length of a chord AB is 4 cm and the length of the arc AB is 5 cm. Find the central angle theta, in radians, correct to four decimal places. Then give the answer to the nearest degree. I think I'm supposed to use Newton's method, but am not sure how to start with this problem.
Answered by Harley Weston. |
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The central angle of a chord |
2009-04-06 |
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From Dale:
How do I find the central angle if I only have the cord length and radius.
Answered by Harley Weston. |
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A space camera circles the Earth |
2008-06-16 |
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From Rita:
A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera.
(a) Find an equation that relates the central angle theta to the height h.
(b) Find an equation that relates the observable distance d and theta.
(c) Find an equation that relates d and h.
(d) If d is to be 3500 miles, how high must the camera orbit above Earth?
(e) If the camera orbits at a height of 400 miles, what distance d on the surface can be seen?
Answered by Penny Nom. |
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The wedges in a circle graph |
2008-05-18 |
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From Libby:
I don't understand how to do this word problem:
The cafeteria workers distributed a survey to the student body asking students to pick 1 from a list of 5 choices for their favorite lunch. The circle graph below gives the results of the survey for the students who responded. What is the measure, in degrees, of the central angle for each choice?
And there is a pie chart that has food choices with these percentages: 25%, 20%, 15%, 10%, and 30%
Answered by Leeanne Boehm and Penny Nom. |
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Chord, radius, arc length and central angle |
2008-04-15 |
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From Cindy:
There is a railroad curve with a chord length of 2000 ft. and a central angle of 35 degrees. What is the radius and arc length of the circular arc?
Answered by Stephen La Rocque. |
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The radius of a circular arc |
2008-02-04 |
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From Bill:
Hi,the Central Angle of a sector of a circle is 40 degrees. The circular arc of the curve has a chord length of 3000 ft. Find the radius(r) of the circular arc.
Answered by Penny Nom. |
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Arc lengths, central angles and radii |
2007-10-04 |
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From Ashutosh:
Jose can remember that the length of an arc is 440cm, but he cannot remember the radius of the arc or the angle at the center. He does know that the angle was a whole number of degrees and the radius was less than 100cm. Find three possible angles and write down the size of each of the possible radii.
Answered by Stephen La Rocque. |
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