Concept explainers
To find whether or not the angle measure and side lengths of a
Answer to Problem 28E
It is not possible to have a triangle whose angle measures are in the ratio
Explanation of Solution
Given information:
Ratio of the angle measures in a triangle is given as
Calculation:
According to the sine rule, in a triangle with angles A, B, C and side lengths a, b and c
Above can be rearranged as
And
Hence ratio of the side lengths are proportionate to the Sine of angles opposite to the side and hence cannot be same ratio as the angles
For the given example: let us assume the angles are 3x, 4x and 5x.
Now, add all the x together.
Now, divide both the sides with 12
This gives the value of
First angle is 3x ,multiply 3 with 15
Second angle is 4x, multiply 4 with 15
Third angle is 5x, multiply 5 with 15
So, the 3 angles are 45, 60 and 75
The side ratio is
Conclusion- It is not possible to have a triangle whose angle measures are in the ratio
Chapter 10 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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