(a)
To find: The ratio of area of the shaded
(a)
Answer to Problem 19WE
The ratio of area of the shaded circles is
Explanation of Solution
Given information:
The givenfigure is shown below.
Calculation:
Let’s the area of middle circle is
Therefore,the ratio of area of the shaded circles is
(b)
To find: The ratio of lateral area of the top part of the cone to the lateral area of whole cone.
(b)
Answer to Problem 19WE
The ratio of lateral area of the top part of the cone to the lateral area of whole cone is
Explanation of Solution
Given information:
The given figure is shown below.
Calculation:
Lateral area of cone in terms of radius and slant height is
Consider the lateral area of cone is
Both the cones are similar so, ratio of radius and slant height would be similar.
The ratio of lateral area of the top part of the cone to the lateral area of whole cone is,
Therefore, the ratio of lateral area of the top part of the cone to the lateral area of whole cone is
(c)
To find: The ratio of lateral area of the top part of the cone to the lateral area of bottom cone.
(c)
Answer to Problem 19WE
The ratio of lateral area of the top part of the cone to the lateral area of whole cone is
Explanation of Solution
Given information:
The given figure is shown below.
Calculation:
The lateral area of the bottom cone is the whole cone area minus the top cone area.
Therefore, the ratio of lateral area of the top part of the cone to the lateral area of bottom cone is
(d)
To find: The ratio of the volume of the top part of the cone to the volume of wholecone.
(d)
Answer to Problem 19WE
The ratio of the volume of the top part of the cone to the volume of whole cone is
Explanation of Solution
Given information:
The given figure is shown below.
Calculation:
The volume of cone in terms of radius and slant height is
Both the cone is similar.Consider the volume of cone is
The ratio of the volume of the top part of the cone is to the volume of whole cone.
Therefore, the ratio of the volume of the top part of the cone to the volume of whole cone is
(e)
To find: The ratio of the volume of the top part of the cone to the volume of bottom cone.
(e)
Answer to Problem 19WE
The ratio of the volume of the top part of the cone to the volume of bottom cone is
Explanation of Solution
Given information:
The given figure is shown below.
Calculation:
The ratio of the volume of the top part of the cone is to the volume of bottom cone.
Therefore, the ratio of the volume of the top part of the cone to the volume of bottom cone is
Chapter 12 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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