(a)
To find: The length of the longer diagonal.
(a)
Answer to Problem 25E
Longer diagonal = 68.15 inches
Explanation of Solution
Given information: Geometry: The lengths of two sides of a parallelogram are 48 inches and 30 inches. One angle measures
Calculation:
Use law of cosines to solve for the longer diagonal.
Simplify and solve for the longer diagonal.
Thus,
Longer diagonal = 68.15 inches
(b)
To find: The area of the parallelogram.
(b)
Answer to Problem 25E
Explanation of Solution
Given information: Geometry: The lengths of two sides of a parallelogram are 48 inches and 30 inches. One angle measures
Calculation:
Find s to use Heron’s formula
Solve for s
Use Heron’s formula to find the area of the triangle.
Simplify and solve for the area of the triangle
Multiply by two to solve for the area of the parallelogram.
Thus,
Chapter 5 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
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