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Trigonometry Basics for Young Learners

Trigonometry

An introduction to the measurement of triangles, sides, and angles.

mathematics geometry triangles

15 Questions Medium Ages 9+ Apr 10, 2026

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About this Study Set

This study set covers Trigonometry through 15 practice questions. An introduction to the measurement of triangles, sides, and angles. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 15 questions from the Trigonometry Basics for Young Learners study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the name of the longest side in a right-angled triangle?

A Hypotenuse
B Adjacent
C Opposite
D Base

2 In a right-angled triangle, what is the sum of the two smaller angles?

A 45 degrees
B 90 degrees
C 180 degrees
D 360 degrees

3 Which trigonometric function represents the ratio of the side opposite an angle to the hypotenuse?

A Cosine
B Tangent
C Sine
D Secant

4 What is the total sum of the internal angles of any triangle?

A 90 degrees
B 180 degrees
C 270 degrees
D 360 degrees

5 If one angle of a right-angled triangle is 30 degrees, what is the measure of the other non-right angle?

A 30 degrees
B 45 degrees
C 60 degrees
D 90 degrees

6 The study of trigonometry primarily focuses on the relationship between which two properties of triangles?

A Area and perimeter
B Sides and angles
C Height and width
D Color and shape

7 What is the name of a triangle where all three sides have different lengths?

A Equilateral
B Isosceles
C Scalene
D Right

8 Which trigonometric ratio is defined as the side adjacent to an angle divided by the hypotenuse?

A Cosine
B Sine
C Tangent
D Cotangent

9 A triangle that has one angle measuring exactly 90 degrees is known as what?

A Acute triangle
B Obtuse triangle
C Right-angled triangle
D Equilateral triangle

10 What is the name of the side that is next to a specific angle in a right-angled triangle?

A Hypotenuse
B Opposite
C Adjacent
D Vertical

11 In trigonometry, what does the 'Tangent' ratio compare in a right triangle?

A Opposite side to adjacent side
B Hypotenuse to opposite side
C Adjacent side to hypotenuse
D Hypotenuse to base

12 How many sides does a triangle have?

A Two
B Three
C Four
D Five

13 Which shape is the foundation for all trigonometric calculations?

A Square
B Circle
C Triangle
D Rectangle

14 What do you call an angle that is less than 90 degrees?

A Obtuse
B Right
C Acute
D Straight

15 If a triangle has two sides of equal length, what is it called?

A Scalene
B Isosceles
C Equilateral
D Right

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