Law of Cosines and Triangle Properties
Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Thomas White
FREE Resource
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16 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary focus of Section 6.2 in Chapter 6?
Trigonometric Identities
Pythagorean Theorem
Law of Cosines
Law of Sines
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of triangles does the Law of Cosines help to solve?
Right triangles
Isosceles triangles
Equilateral triangles
Oblique triangles
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for the Law of Cosines?
a^2 = b^2 + c^2 + 2bc * cos(A)
a^2 = b^2 + c^2 - 2bc * sin(A)
a^2 = b^2 - c^2 - 2bc * cos(A)
a^2 = b^2 + c^2 - 2bc * cos(A)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you find an angle using the Law of Cosines?
By using the tangent function
By using the inverse sine function
By using the sine function
By using the inverse cosine function
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Example 1, why can't the Law of Sines be used initially?
Because no side lengths are given
Because all angles are given
Because all side lengths are equal
Because no angles are given
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving for angle C in Example 1?
Use the Pythagorean Theorem
Use the Law of Sines
Find the shortest side
Find the longest side
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Example 2, what is the given angle used for?
To find the remaining sides
To find the area of the triangle
To find the perimeter of the triangle
To find the height of the triangle
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