ISEE Upper Level Math : How to find the angle of a sector
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Example Questions
Example Question #1 :如何找到一个行业的角度
A giant clock has a minute hand four feet long. Since noon, the tip of the minute hand has traveled
The circumference of the path traveled by the tip of the minute hand over the course of one hour is:
Since the tip of the minute hand has traveled
Example Question #2 :如何找到一个行业的角度
Figure NOT drawn to scale
Refer to the above diagram.
An inscribed angle of a circle that intercepts a semicircle is a right angle; therefore,
Inscribed
The major arc corresponding to this minor arc,
Example Question #3 :如何找到一个行业的角度
Note: Figure NOT drawn to scale
Refer to the above diagram.
An inscribed angle of a circle that intercepts a semicircle is a right angle; therefore,
Inscribed
Example Question #4 :如何找到一个行业的角度
In the above diagram, radius
Calculate the length of
Inscribed
This makes
of the circle.
The circumference of a circle is
The length of
Example Question #5 :如何找到一个行业的角度
Figure NOT drawn to scale.
The circumference of the above circle is 120.
The length of
If two secants are constructed to a circle from an outside point, the degree measure of the angle the secants form is half the difference of those of the arcs intercepted - that is,
Example Question #6 :如何找到一个行业的角度
Figure NOT drawn to scale.
Refer to the above diagram.
The circumference of the circle is the sum of the two arc lengths:
The length of
The segments shown are both tangents from
Example Question #7 :如何找到一个行业的角度
Figure NOT drawn to scale.
The circumference of the above circle is 100.
The length of
If two chords cut each other inside the circle, as
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