9th Grade Right Triangle Ratios Quizzes, Questions & Answers

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Trigonometry Quiz: Calculate Unknown Side Lengths!

This Trigonometry Quiz assesses your ability to calculate unknown side lengths using trigonometric ratios. It covers the use of Sin, Cos, and Tan to find side lengths in right triangles, sharpening skills crucial for academic and...

Questions: 13 | Attempts: 994 | Last updated: Mar 22, 2025

Sample Question 1
What trig ratio should be used to calculate either side a or h?

Sin ϴ

Cos ϴ

Tan ϴ

Sample Question 2
What trig ratio should be used to calculate either side a or o?

Sin ϴ

Cos ϴ

Tan ϴ

Sample Question 3
What trig ratio should be used to calculate either side h or o?

Sin ϴ

Cos ϴ

Tan ϴ

Apply the Ratio

Can you go beyond recognition and actually apply trig ratios to solve problems? In this quiz, you’ll use sine, cosine, and tangent to find missing side lengths in right triangles. We bring you this quiz so you can...

Questions: 20 | Attempts: 10 | Last updated: Oct 14, 2025

Sample Question
If sin θ = 2/5 for an acute angle θ, what is the length of the hypotenuse?

3

5

√21

2