Algebra and Trigonometry: Non-Right Triangles and Law of Cosines
Interactive Video
•
Amelia Wright
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Mathematics
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9th - 12th Grade
•
Hard
55:49
10 questions
Show answers
1.
Multiple Choice
What is the primary condition for using the Law of Cosines?
When the triangle is a right triangle
When the triangle is an equilateral triangle
When the triangle is a non-right triangle
When the triangle has all sides equal
2.
Multiple Choice
In Heron's formula, what does 's' represent?
The height of the triangle
The semi-perimeter of the triangle
The sum of all sides
The area of the triangle
3.
Multiple Choice
Which formula is used to find an unknown angle when all sides of a triangle are known?
Heron's Formula
Law of Cosines
Pythagorean Theorem
Law of Sines
4.
Multiple Choice
What is the first step in solving for an unknown side using the Law of Cosines?
Using the Pythagorean Theorem
Setting up the equation with known sides and angle
Cross-multiplying the sides
Finding the semi-perimeter
5.
Multiple Choice
How do you calculate the area of a triangle using Heron's formula?
By using the Law of Sines
By using the Law of Cosines
By using the height and base
By using the semi-perimeter and side lengths
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