a
To find:The coordinates of point D
a
Answer to Problem 4PSA
The coordinates of point D are
Explanation of Solution
Given information:The following information has been given
Origin is the center of the
Radius is four units
Point G and D lie on X and Y axes respectively
Calculation:We know that the radius is four units. Also, we know that the point D lies on the Y axis.
Now, as the radius is four units, point D will also be the same distance away from the origin. Hence, the coordinates of point D can be given by
b
To find:The area of sector DOG
b
Answer to Problem 4PSA
The area of sector DOG is
Explanation of Solution
Given information:The following information has been given
Origin is the center of the circle
Radius is four units
Point G and D lie on X and Y axes respectively
Calculation:We know that the measure of an arc is the degree measure subtended by the arc to the center of the circle. Hence, the
We know that the area of the sector can be found by
Hence, we substitute the value of radius as four units, and we get
Chapter 9 Solutions
Geometry For Enjoyment And Challenge
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