Скачать или смотреть Practical Geometry - Maths Class 8th - Ex 4.3 - Q1 part 3 - Chapter 4 - NCERT - CBSE

Practical Geometry - Maths Class 8th - Ex 4.3 - Question 1 part 3 - Chapter 4 - NCERT - CBSE

Full exercise on Practical Geometry, fully solved. This is a video tutorial for 8th class NCERT CBSE students. For other educational stuff, subscribe and press bell icon.

You have learnt how to draw triangles in Class VII. We require three measurements (of sides and angles) to draw a unique triangle. Since three measurements were enough to draw a triangle, a natural question arises whether four measurements would be sufficient to draw a unique four sided closed figure, namely, a quadrilateral.

Constructing a Quadrilateral

How to construct/draw 60 degrees angle with compasses only
How to construct/draw 90 degrees angle with compasses only
How to construct/draw 105 degrees angle with compasses only
How to construct/draw 85 degrees angle with compasses only
How to construct/draw 110 degrees angle with compasses only
How to construct/draw 60 degrees angle without protractor
How to construct/draw 90 degrees angle without protractor
How to construct/draw 105 degrees angle without protractor
How to construct/draw 85 degrees angle without protractor
How to construct/draw 110 degrees angle without protractor

We shall learn how to construct a unique quadrilateral given the following measurements: When four sides and one diagonal are given. When two diagonals and three sides are given. When two adjacent sides and three angles are given. When three sides and two included angles are given. When other special properties are known. When the lengths of four sides and a diagonal are given

Example 2: Construct a quadrilateral ABCD, given that BC = 4.5 cm,AD = 5.5 cm, CD = 5 cm the diagonal AC = 5.5 cm and diagonal BD = 7 cm.

Solution: A rough sketch will help us in visualising the quadrilateral. We draw this first and mark the measurements.

When two adjacent sides and three angles are known. As before, we start with constructing a triangle and then look for the fourth point to complete the quadrilateral.

Construct a quadrilateral MIST where MI = 3.5 cm, IS = 6.5 cm, ANGLE M = 75 degrees, ANGLE I = 105 degrees and ANGLE S = 120 degrees.

EXERCISE 4.3
1. Construct the following quadrilaterals.
(i) Quadrilateral MORE (ii) Quadrilateral PLAN
MO = 6 cm PL = 4 cm
OR = 4.5 cm LA = 6.5 cm
ANGLE M = 60 degrees ANGLE P = 90 degrees
ANGLE O = 105 degrees ANGLE A = 110 degrees
ANGLE R = 105 degrees ANGLE N = 85 degrees
(iii) Parallelogram HEAR (iv) Rectangle OKAY
HE = 5 cm OK = 7 cm
EA = 6 cm KA = 5 cm
ANGLE R = 85 degrees

#Class8 #PracticalGeometry #NCERT #NcertSolutions #solvedexercises #teaching #CBSE #maths #MathematicsClass8th #polygons #samrules #compasses

Make sure to Subscribe and get the latest tutorials for your delight :)
http://www.youtube.com/subscription_c...

Make sure to check out our other Video Tutorials!

Also, check us out when we're posting other helpful videos all throughout the week to help you tell more and grow more using online video.