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# CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes PDF

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## CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes

If you are looking forward to scoring excellent marks in your Class 7 Maths Exams then it becomes very significant to understand the importance of Revision. Revision is very important as it helps you remember all the important chapters and co-related concepts that you have learned earlier and for the purpose of Revision, Revision Notes are always considered the best as they make your learning easy and convenient.

Chapter 6 of CBSE Class 7 Maths is The Triangle and its Properties. Swiflearn offers the best and most reliable CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes that will make students understand all the important topics & concepts of this chapter and will help them in higher studies also. Free CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes provided here are prepared under the auspices of our Excellent Teachers keeping in mind the latest CBSE guidelines.

CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes are one of the most important pieces of study material that students can use as it will make their learning convenient and will also save them a lot of time. Students can download CBSE Class 7 Maths Chapter 6 The Triangle and its Properties Revision Notes in PDF format, use them to revise all their previously learned concepts, and hence score better in their exams.

## Introduction

A triangle is a simple closed curve which is created by three line-segments.

• A triangle mainly consists three vertices, three sides and three angles.

Properties

• The sum of the interior angles of a triangle is always equals to 180o
• The sum of the measure of any two sides of a triangle is always greater than the measure of the third side.
• An exterior angle of the triangle is equal to the sum of the interior opposite angles of the triangle.

### Types of Triangle Based on sides

Equilateral Triangle

• All three sides are equal.
• Three angles are also equal.

Isosceles Triangle

• Have two equal sides and angles.
• The angles opposite to the equal sides measure the same.

Scalene triangle

• Have all the 3 unequal sides.
• The three angles will also be different.

### Type of Triangles Based on Angles

Acute angle Triangle

All angles of the triangle are acute(<90 degree).

Right-angle triangle

A triangle whose one angle is 90 degree is called as Right angle triangle.

Obtuse angle Triangle

One angle of such triangle is greater than 90 degree (obtuse angle) and other two are acute.

#### Medians of a Triangle

Median is the line segment which made by joining any vertex of the triangle with the midpoint of its opposite side.

Median divides the side into two equal parts.

#### Altitudes of a Triangle

Altitude is the perpendicular drawn from a vertex of the triangle over its opposite side.

Altitude is the height if we take the opposite side as the base

Formula for area of triangle:

1/2 (base x height)