# NCERT Solutions for Class 7 Maths Chapter 6 Exercise 6.1

NCERT Solutions for Class 7 Maths Chapter 6 Exercise 6.1 (Ex. 6.1) Triangles and its Properties updated for academic session 2020-2021 CBSE and state board students. All the contents are in PDF and Videos format to make study better for children.

Class 7 math exercise 6.1 contents related to altitude and median. It helps us to know the way to draw an altitude or median. Questions in exercise 6.1 are easy to solve.## Class 7 Maths Chapter 6 Exercise 6.1 Solution

Class: 7 | Mathematics |

Chapter: 6 | Triangles and its Properties |

Exercise: 6.1 | Hindi and English Medium Solutions |

### CBSE NCERT Class 7 Maths Chapter 6 Exercise 6.1 Solution in Hindi and English Medium

### Class 7 Maths Chapter 6 Exercise 6.1 Solution in Videos

#### Triangle

Let A, B, C be three no collinear points. Then, the figure formed by the three line segments AB, BC and CA is called a triangle with vertices A, B and C, denoted by triangle ABC.

#### Parts of Triangle ABC

The triangle ABC has following parts:

(i) Three sides, namely AB, BC and CA

(ii) Three angles, namely ∠BAC, ∠ABC and ∠BCA to be denoted by ∠A, ∠B, and ∠C respectively.

The three sides and three angles of a triangle are called the six parts or elements of a triangle.

In DABC, the points A, B and C are called its vertices.

Clearly, A is the vertex opposite to the side BC.

Similarly, B s the vertex opposite to the side CA.

And, C is the vertex opposite to the side AB.

#### Various Types of Triangles

Naming Triangles by Considering the Lengths of Their Sides

##### (i) Equilateral Triangle:

A triangle having all sides equal is called on equilateral triangle.

##### (ii) Isosceles Triangle:

A triangle having two sides equal is called on isosceles triangle.

##### (iii) Scalene Triangle:

A triangle having all sides of different lengths is called a scalene triangle.

##### What are the 5 types of triangles?

Types of Triangles:

(i) Equilateral triangle. The Equilateral triangle has three congruent sides and three congruent angles.

(ii) Isosceles triangle. The Isosceles triangle has two equal sides and two equal angles.

(iii) Scalene Triangle. The Scalene Triangle has no congruent sides. …

(iv) Acute Triangle.

(v) Obtuse Triangle.

##### Perimeter of a Triangle:

The sum of the lengths of the sides of a triangle is called its perimeter of triangle.

##### How do we find the perimeter of a triangle?

To calculate the perimeter of a triangle, add the length of its sides. For example, if a triangle has sides a, b, and c, then the perimeter of that triangle will be P = a + b + c.

##### What is the most common triangle?

The equilateral triangle is by far the most common triangle used in architecture. An equilateral triangle features three congruent sides and angles measuring 60 degrees on each corner. The lengths of the sides vary.

##### What makes similar triangles?

If two pairs of corresponding angles in a pair of triangles are congruent, then the triangles are similar. We know this because if two angle pairs are the same, then the third pair must also be equal. When the three angle pairs are all equal, the three pairs of sides must also be in proportion.

##### How do triangles relate to the real world?

Some Real Life Examples Of Triangles are:

Traffic Signs. Traffic signs form the most commonly found examples of the triangle in our everyday life.

Truss Bridges. Truss bridges have supporting structures constructed in triangular shapes. Roof. The roofs of the houses are made in the triangle shape.