# NCERT Solutions for Class 8 Maths Chapter 4

NCERT Solutions for Class 8 Maths Chapter 4 PRACTICAL GEOMETRY in English Medium as well as Hindi Medium updated for new academic session 2020-21 based on latest CBSE Curriculum 2020-2021 and updated NCERT Books for current session.

Use online Prashnavali 4.1, Prashnavali 4.2, Prashnavali 4.3, Prashnavali 4.4 and Prashnavali 4.5 in Hindi Medium as well as English Medium updated for new academic session 2020-2021. Download Exercise 4.1, Exercise 4.2, Exercise 4.3, Exercise 4.4 and Exercise 4.5 in English Medium free to use online or download in PDF. NCERT Solutions 2020-21 for class 8 Maths are useful for all board whoever following the CBSE Curriculum 2020-2021. These solutions are based on updated NCERT Books 2020-21 for the academic session 2020-2021.Page Contents

- 1 8 Maths Chapter 4 Solutions in English Medium
- 2 8 Maths Chapter 4 Solutions in Hindi Medium
- 2.0.1 What are the main constructions in Class 8 Maths Chapter 4 NCERT Book?
- 2.0.2 Can we draw a quadrilateral uniquely if only the lengths of its four sides are given?
- 2.0.3 Can we draw a quadrilateral uniquely if its three sides and one included angle is given?
- 2.0.4 Can we draw a quadrilateral uniquely if its two diagonals and three sides are known?

## NCERT Solutions for Class 8 Maths Chapter 4

Class: | 8 |

Subject: | Maths – गणित |

Chapter 4: | Practical Geometry |

### Class 8 Maths Chapter 4 Solutions

Class 8 Maths Chapter 4 Practical Geometry all exercises in English Medium as well as Hindi Medium are given below to study online or download in PDF form for academic session 2020-21. Download Class 8 Maths App or कक्षा 8 गणित App for offline use. It works without internet, once downloaded.

### 8 Maths Chapter 4 Solutions in English Medium

### 8 Maths Chapter 4 Solutions in Hindi Medium

#### Class 8 Maths Exercise 4.1 & 4.2 Solutions in Video

#### Class 8 Maths Exercise 4.3 & 4.4 Solutions in Video

#### Class 8 Maths Exercise 4.5 Solutions in Video

#### More about Class 8 Maths Chapter 4

##### What are the main constructions in Class 8 Maths Chapter 4 NCERT Book?

There are main 5 types of constructions in Class 8 Maths chapter 4 as per NCERT Book. These are as follows:

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.

##### Can we draw a quadrilateral uniquely if only the lengths of its four sides are given?

No, A quadrilateral can be constructed uniquely if the lengths of its four sides as well as a diagonal is given.

##### Can we draw a quadrilateral uniquely if its three sides and one included angle is given?

No, a quadrilateral can be constructed uniquely if its three sides as well as two included angles are given.

##### Can we draw a quadrilateral uniquely if its two diagonals and three sides are known?

Yes, it is possible.

A quadrilateral can be constructed uniquely if its two diagonals and three sides are known.

In Chapter 4 Practical Geometry, we have to learn how to construct a quadrilateral with the given specifications: like all four sides and two diagonals, sides, angles and one of its diagonals, three angles, a side and two diagonals etc. The following cases are important to do in this chapter:

1. A quadrilateral can be constructed uniquely if its two adjacent sides and three angles are known.

2. A quadrilateral can be constructed uniquely if its three sides and two included angles are given.

3. A quadrilateral can be constructed uniquely if its two diagonals and three sides are known.

4. A quadrilateral can be constructed uniquely if the lengths of its four sides and a diagonal is given.

##### कृपया ध्यान रखें

किसी भी ज्यामितीय रचना से पहले उसका एक rough चित्र बना लें और उसे देख कर यह निर्धारित करना आसान हो जाता है कि पहले कौन सी भुजा या कौन सा कोण बनाना है।

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