NCERT Solutions for Class 6 Maths Chapter 14 Exercise 14.2
NCERT Solutions for Class 6 Maths Chapter 14 Exercise 14.2 (Ex. 14.2) Practical Geometry updated for academic session 2020-2021 free to use online or download in PDF. The step by step explanation of each question is also given in video solution.So students can take help through videos of exercise 14.2 of class 6 math. Class 6 math exercise 14.2 contains the questions based on construction of a line and line segments.
Class 6 Maths Chapter 14 Exercise 14.2 Solution
|Chapter: 14||Practical Geometry|
|Exercise: 14.2||PDF and Videos Solutions|
CBSE NCERT Class 6 Maths Chapter 14 Exercise 14.2 Solution in Hindi and English Medium
Class 6 Maths Chapter 14 Exercise 14.2 Solution in Videos
There are two triangular shaped instruments called set-squares
n the geometrical box. These are usually made of thin transparent plastic sheet.
In one, the angles are of 90, 45, 45 and in the other, the angles are 30, 60, 90. The set-square in which the angles are of 300, 60 and 90 is called the 30° set-square and the set-square in which the angles are of 900, 450 and 450 is called the 45° set square. Two perpendicular edges in these set-squares are usually graduated, one in centimetres and the other in inches.
Set-squares are used to draw parallel and perpendicular lines. They can also be used to construct specific angles of 30°, 45°, 60° and 90°.
What is the use of set squares?
A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline.
Let us construct an angle of 45° using a set-square:
Step-1: Place 45° set-square on a sheet of paper.
Step-2: Hold the set-square firmly with one hand and with other, draw two rays OA and OB along the edges using a sharp pointed pencil from the vertex of 45° angle of the set-square. The angle so formed is the required 45° angle.
Note: Similar steps can be used to construct an angle of 30° or 60° or 90° by choosing the appropriate set-square.
Two lines are said to be perpendicular if one of the angles formed by them is a right angle (or 90°). lines PQ and RS are perpendicular to each other at the point O because angle ROQ = 90°.
We write RS Ʇ PQ.
Note: Two segments (or rays) are said to be perpendicular if the lines containing them are perpendicular.
Why it is called Set Square?
It could also be that the “set square” normally comes from a “geometry set” (a set of rulers/tools), so it is the “set square” the “square-making tool from the set”.
What are the two types of set square?
There are two main types of set square. One has an angle of 450 and the other 300 /600 degree angles. The 450 set square also has a 900 angle. This can be used for drawing vertical lines.
How do you divide a line with a set square?
To divide a line with a set square these are steps:
(i) Choose the work-piece that you want to divide.
(ii) Choose how many sections you want to make.
(iii) Draw a diagonal line above the line being divided.
(iv) Mark out equal points along the diagonal line.
(v) Use a square / 900 angle to draw lines from the points on the diagonal line down to the original work-piece.