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Fundamental Geometry Concepts

Basic Geometry

This quiz covers basic geometric shapes, properties, and definitions suitable for teenagers.

geometry shapes angles polygons lines

15 Questions Easy Ages 13+ Apr 3, 2026

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About this Study Set

This study set covers Basic Geometry through 15 practice questions. This quiz covers basic geometric shapes, properties, and definitions suitable for teenagers. 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 Fundamental Geometry Concepts study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the name of a polygon with three sides?

A Quadrilateral
B Triangle
C Pentagon
D Hexagon

2 What is the sum of the interior angles of a triangle?

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

3 A line segment that connects two points on a circle and passes through the center is called a:

A Radius
B Chord
C Diameter
D Tangent

4 What type of angle measures exactly 90 degrees?

A Acute angle
B Obtuse angle
C Right angle
D Straight angle

5 How many sides does a hexagon have?

6 What is the name of a four-sided polygon?

A Triangle
B Pentagon
C Hexagon
D Quadrilateral

7 A shape with all sides of equal length and all angles equal is called:

A Irregular
B Asymmetrical
C Regular
D Oblique

8 Parallel lines are lines that:

A Cross each other at one point
B Never intersect
C Form a right angle
D Are curved

9 What is the geometric term for a point where two or more lines or edges meet?

A Face
B Edge
C Vertex
D Side

10 An angle that measures less than 90 degrees is called an:

A Acute angle
B Obtuse angle
C Right angle
D Reflex angle

11 A closed shape with only curves and no straight sides is a:

A Polygon
B Circle
C Rectangle
D Square

12 What is the name of a polygon with five sides?

A Quadrilateral
B Hexagon
C Pentagon
D Octagon

13 The distance from the center of a circle to any point on its edge is called the:

A Diameter
B Circumference
C Radius
D Chord

14 A triangle with all three sides of equal length is called an:

A Isosceles triangle
B Scalene triangle
C Equilateral triangle
D Right triangle

15 A shape with six sides is called a:

A Pentagon
B Heptagon
C Octagon
D Hexagon

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