Use the law of sines to find the missing measurements when given two acute angles

Use the law of sines to find the missing measurements when given two acute angles

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

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The video tutorial explains how to solve for missing sides and angles in an oblique triangle using the Law of Sines. It begins by discussing the limitations of using the Pythagorean theorem and trigonometric identities in non-right triangles. The instructor then introduces the Law of Sines, explaining its application through proportions of side lengths and their corresponding angles. The tutorial includes step-by-step examples of solving for unknown sides using cross multiplication, emphasizing the importance of checking calculations for accuracy.

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7 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain why the Pythagorean theorem cannot be applied to the triangle discussed.

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the sum of all angles in a triangle?

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

How do you find the measure of angle B in the triangle?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the Law of Sines and how is it used in solving triangles?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

Describe the process of cross multiplication as used in solving for side lengths.

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the value of side length C after applying the Law of Sines?

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7.

OPEN ENDED QUESTION

3 mins • 1 pt

What precautions should be taken when using a calculator to find sine values?

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