Definition: Area of 2D shapes

The area of a 2D shape is a measure of the amount of space inside the shape.

It is typically measured in square units (such as square meters, square centimeters, etc.).

The shapes known as two-dimensional (2D) shapes, or flat shapes, have only two dimensions.

The area of shapes such as circles, triangles, squares, rectangles, parallelograms, etc., represents the region they occupy in space.

Explanation:

In this image, it shows the formulas for 2D shapes.

Definition: Area of 3D shapes

The surface area of a solid object measures the total area that the object’s surface occupies.

A shape that occupies an area of three square meters would have the same total area as three squares of the same size.

Explanation:

This image shows the formulas for 3D shapes.

Definition: Volume of 3D shapes

Volume is defined as the space occupied within the boundaries of an object in three-dimensional space. It is also known as the capacity of the object.

Since different three-dimensional objects have different shapes, their volumes are also variable. Let us look at some three-dimensional shapes and learn how to calculate their volume(V).

Explanation:

This image shows the formulas for Volumes.

Definition: Angles

An angle is a geometric figure formed by two rays, called the sides of the angle, sharing a common endpoint, known as the vertex of the angle.

Angles are measured in degrees or radians, which quantify the amount of rotation from one ray to the other around their common vertex.

The size of an angle is typically measured in degrees (°) or radians (rad). One complete revolution is 360 degrees or 2π radians.

Explanation:

An acute angle measures less than 90° at the vertex. An obtuse angle is between 90° and 180°. A right angle precisely measures 90° at the vertex. An angle measuring exactly 180° is a straight angle. A reflex angle measures between 180°- 360°. A complete angle measure equals 360°.