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Finding Area of Non-Right Triangles

Finding Area of Non-Right Triangles

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Practice Problem

Hard

Created by

Thomas White

FREE Resource

The video tutorial covers the process of finding the area of a non-right angle triangle using trigonometric rules. It begins with an introduction to the problem, followed by a detailed explanation of the cosine rule to find the sides of the triangle. The sine rule is then applied to determine the angles. Finally, the area is calculated using the derived values. The tutorial concludes with recommendations for further study and practice.

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9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main problem discussed in the video?

Finding the perimeter of a triangle

Calculating the volume of a cylinder

Finding the area of a non-right angle triangle

Solving a quadratic equation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which formula is used to find the area of a non-right angle triangle?

A = 1/2 * AB * cos C

A = AB * sin C

A = 1/2 * AB * sin C

A = 1/2 * base * height

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving the problem according to the video?

Calculating the perimeter

Applying the cosine rule

Using the sine rule

Finding the height of the triangle

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the cosine rule help to find in this problem?

An angle

A length

The area

The perimeter

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can't the cosine rule be used again in the problem?

The angles are too small

It's not applicable to triangles

It's too complex

Lack of information

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the next step after applying the cosine rule?

Using the tangent rule

Finding another angle using the sine rule

Finding the perimeter

Calculating the area directly

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of using the sine rule in this problem?

To determine the perimeter

To calculate the area

To find a missing angle

To find a missing length

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