Understanding Elementary Shapes

# Understanding Elementary Shapes

## An Overview of Elementary Shapes in Maths for Class 6

There are a variety of shapes that are studied in mathematics. These shapes can be classified into two categories: two-dimensional shapes and three-dimensional shapes.

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Two-dimensional shapes are shapes that have only width and length, such as a rectangle or a square. Three-dimensional shapes are shapes that have width, length, and height, such as a cube or a sphere.

Some of the most common two-dimensional shapes are points, lines, and polygons. Points are the simplest shape and are just a single dot. Lines are made up of points and are defined by the points that they connect. Polygons are shapes made up of multiple lines and are defined by the number of angles they have.

Some of the most common three-dimensional shapes are cubes, spheres, and pyramids. Cubes are three-dimensional squares and are the simplest of the three shapes. Spheres are three-dimensional circles and are the most symmetrical of the three shapes. Pyramids are three-dimensional triangles and are the most unstable of the three shapes.

### Line Segments

Two line segments are said to be “congruent” if they have the same length and the same orientation. This means that if you draw one segment on a piece of paper and then fold the paper so that the segment lines up with the other segment, the two segments will match up perfectly.

### How to Measure Line Segments?

To measure a line segment, you need a ruler or a straightedge. Place the ruler or straightedge at one end of the line segment and measure the length of the line segment.

### Right Angles and Straight Angles

A right angle is an angle of 90 degrees. A straight angle is an angle of 180 degrees.

### How to Measure Angles?

There are a few ways to measure angles. One way is to use a protractor. Another way is to use a ruler and measure the length of the angle.

## Types of Triangles

There are three types of triangles: equilateral, isosceles, and scalene.

• An equilateral triangle has three sides of the same length. The angle between any two sides is 60 degrees.
• An isosceles triangle has two sides of the same length. The angle between these two sides is always 90 degrees.
• A scalene triangle has three sides of different lengths. The angle between any two sides can be anything.

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