Were you good at geometry in school? Today you have the chance to prove yourself. This very simple geometry quiz will test your knowledge of geometry. Do you remember what the perimeter is? What does a rhomb look like? Get down to the questions and earn your score!

Geometry is one of the oldest branches of mathematics. It studies the sizes, shapes, positions, angles, and dimensions of things.

Geometry can be divided into several categories. These include:

- plane geometry is about flat, 2D shapes like squares, circles, and triangles. They only have two dimensions and can be drawn on a piece of paper.
- solid geometry is about three-dimensional objects like cubes, prisms, cylinders, and spheres.

Two-dimensional shapes, as their names say, only have two dimensions – the length and the width. We can additionally categorize them into open and closed shapes.

Open shapes are figures with different starting and ending points. Their line segments or curves do not meet.

On the other hand, closed shapes start and end at the same point. Their line segments or curves are connected or meet end to end.

Three-dimensional shapes are objects with three dimensions – length, width, and height. Unlike two-dimensional shapes, three-dimensional figures have thickness or depth.

3D shapes have attributes such as faces, edges, and vertices. The face is the flat surface of a three-dimensional object. Vertex is a point on a polygon where the sides or edges of the shape meet or where two rays or line segments meet.

A point is an exact location. It has no size and no dimensions, only position. Points usually have a name, often a letter like A or B.

A line is straight, has no thickness, and extends in both directions indefinitely. A line has no ends.

A line segment is a line that has distinctive endpoints. When it has just one end, it’s called a ray.

Angle in geometry is the figure formed by two rays meeting at a common endpoint. An angle is illustrated by the symbol ∠. Angles are measured in degrees (°) using a protractor. For example, 90 degrees is represented as 90°.

An acute angle is more than 0° and than less then 90°. Remember, there’s a difference between an acute angle and a **cute **angle 😉

An obtuse angle measures between 90° and 100°. A right angle measures exactly 90°.

A straight angle is precisely 180°. A reflex angle measures between 180° and 360°. A complete angle is 360°.

Similarity in geometry is when two shapes are the same, but their sizes may vary. Congruence is when two figures are the same in shape and size.

A triangle has three sides and three angles. The triangle’s angles always add to 180°.

An equilateral triangle has three equal sides and three equal angles that are always 60°. An isosceles triangle has two equal sides and two equal angles. A scalene triangle has no equal sides and no equal angles.

A circle is a round-shaped figure that has no corners or edges. In geometry, we can define a circle as a closed, two-dimensional curved shape.

The center of a circle is the point in a circle from which all distances to the circle’s points are equal. This distance is known as the circle’s radius.

A line segment passing through the center of a circle, and having its endpoints on the circle, is called the diameter of the circle.

A square we can describe as a closed, two-dimensional shape with four equal sides. It has four sides, four angles, and four vertices, which means it’s quadrilateral. All the sides of a square are equal in length. All interior angles are equal and right angles, and the sum of all of them is always 360°.

A rectangle is a closed, two-dimensional shape with four sides, four corners, and four right angles. The opposite sides of a rectangle are equal and parallel.

What is a perimeter? It’s a distance around a two-dimensional figure. In geometry, the perimeter is defined as the total length of a shape’s boundary. For example, if a rectangle’s sides are 7cm and 3 cm, this is how you calculate the perimeter: 7+7+3+3=20.

To say it simply, the perimeter is a sum of sides.

The perimeter of a circle is called the circumference.

The area is the size of a shape’s surface. It’s defined as the total space taken up by a flat (2-D) surface or shape of an object.

There are special formulas for certain shapes to calculate their area. For example, the formula for a rectangle is area = w x h. W means width, and h means height.

Do you want to know a fun fact? The term “area” is derived from Latin, meaning “a plain piece of empty land”. It also means “a particular amount of space contained within a set of boundaries”.

Are you ready to test your geometry skills? Get down to the questions and solve some simple exercises! Do you think you can get a perfect score?

### How many questions are in the quiz?

There are 20 questions.

### How high of a score can you get?

You can get up to 20 points!