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# RD Sharma Solutions for Class 7 Maths Chapter 21

Last updated date: 14th Sep 2024
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## Maths Solution PDF for Mensuration II ( Area of Circles)

You can download RD Sharma Solutions of Class 7 Maths Chapter 21 here. To help students improve their proficiency and subject awareness, these Class 7 RD Sharma Mensuration solutions are available for free. Get a free PDF of RD Sharma Class 7 Solutions Chapter 21 Circle Area from the links provided. Class 7 RD Sharma Mensuration is a mathematics division that requires the study of numerous geometric forms, areas, and volumes.

## RD Sharma Solutions for Class 7 Maths Chapter 21 - Mensuration II

Mensuration is the study of measuring different 2D and 3D objects in relation to height, depth, area and volume. Understanding Menstruation is now made easier with RD Sharma’s textbook solutions for Class 7 Mathematics chapter 21.  In this chapter RD Sharma Textbook Solutions solely focuses on the perimeter and area of rectangular figures. Students can now download RD Sharma’s Solution for class 7 Mathematics chapter 21 on Vedantu.com. These resources are available free of cost to help students better learn their study material and gain a simple understanding of their subject material.

Mensuration was first discovered by the Egyptians to help measure and survey their lands. It was later expanded by great individuals like Pythagoras, Euclid, Archimedes and Ptomely. Today is a vital part of many fields like Construction and Packaging. While the results of mensuration measurements are estimates rather than actual physical measurements, the calculations are commonly considered as being extremely accurate. RD Sharma’s Textbook Solutions is your one-stop guide for all your questions and answers. Our experts at Vedantu have structured these solutions to help understand every doubt you might have. There are various methods you can find in this textbook to make it convenient for your understanding and study. You will also find a step by step procedure for every problem in the textbook. The book is written following the current CBSE syllabus and adheres to all CCE guidelines.

### Important Topics in Class 7 RD Sharma Mensuration is Mentioned Below.

Some of the important topics in RD Sharma Class 7 Solutions Chapter 21 are the definition of a circle, the diameter of a circle, the relation between the circle and its diameter, the circumference of a circle, types of circles like concentric circles, and congruent circles, finding the area of a circle, the chord of a circle and circular region of the circle.

### Exercises in RD Sharma Solutions of Class 7 Maths Chapter 21

• Exercise 21.1

• Exercise 21.2

Area of Circles Chapter 21, Mensuration II consists of two exercises. RD Sharma Solutions for Class 7 on Vedantu provides answers to all questions present in the exercises. Mentioned below are some of the concepts that are discussed in this Chapter.

• Definition of circle

• Circumference of a circle

• The relation between diameter and circle

• Area of a circle

• The diameter of a circle

• Circular region

• Chord of a circle

• Concentric circles

• Congruent circles

### Preparation Tips

• Each day, research a bit and give your brain a rest every 45 minutes. The night before exams, stop cramming - it's not the way to guarantee a strong score.

• Exam stress is completely normal; a little bit of stress will also be a good motivator. However, the efficiency will be adversely influenced by too much of it. So take frequent breaks, occasional workouts, and spend time with friends to relax. For a moment, walk away from the books if you start feeling irritated or stressed.

### Conclusion

Students should automatically turn to the RD Sharma Solutions of Class 7 Maths Chapter 21 in case of any uncertainty, to clear up all their problems. Our experts have prepared these answers, of which we have provided numerous ways of addressing the issue. Students can consider the various methods of addressing questions and arrange a satisfactory approach that they find convenient by referring to the various forms of Class 7 RD Sharma Mensuration solution. RD Sharma Class 7 Solutions Chapter 21 Mensuration II teaches you how to answer step-by-step all the problems and questions found in RD Sharma textbooks. The book is developed according to the current pattern of the CBSE syllabus and meets all the CCE guidance.

## FAQs on RD Sharma Solutions for Class 7 Maths Chapter 21

1. What Does Basic Measurement Mean?

Measurement is the process of assigning quantities to items and their properties with the use of mathematics and the help of analysis and definition of objects and their interactions. Other types of measurement are more precise, such as determining a person's weight in pounds or kilograms, or their height in feet and inches or metres. To help with measurements there are different tools like scales and measuring tapes to help us get accurate information. There are four basic measurements - Weight, Length, Area and Volume.

2. What is the relationship between a circle's circumference and radius?

A circle's radius is a line drawn from the circle's direct centre to its outside edge. From the centre point, a radius can be drawn in any direction. The radius of a circle is half the length of its diameter, which is the line that divides the circle into two halves. A circle's radius is a line drawn from the circle's direct centre to its outside edge. From the centre point, a radius can be drawn in any direction. The radius of a circle is half the length of its diameter, which is the line that divides the circle into two halves. The equation for the circumference of a circle is revealed by the definition of pi. The circumference of a circle divided by its diameter equals pi.

3. What is the distinction between circles that are congruent and concentric?

Two circles are congruent if their dimensions are similar. The dimension can be determined as the radius, diameter, or circumference. There's a good chance they'll cross paths. The circles with a common centre point are known as concentric circles.  It's recognised by two or more circles in the middle with the same point. An annulus is an area between two concentric circles with different radii. In simple words, concentric circles have the same centre and radius while congruent circles have different radii.

4. How is Mensuration and Basic Measurement different?

Measurement is the act of measuring an area or length of an object. This is mostly done with the help of measuring tools. Mensuration on the other hand is a branch of mathematics that uses derivation and algebraic formulae to measure objects with relation to Height, length, depth, area and volume. The basic difference between Mensuration and Measurement is that Measurements use the help of tools and Mensuration uses the help of math formulas.  Although they might seem similar their procedures are very different.

5. What is the Purpose of Mensuration?

Mensuration is a part of mathematics. It is concerned with the measurement of geometrical figures and shapes such as the cube, cuboid, cone, sphere, and cylinder, among others. Surface area, volume, perimeter, and other parameters can be measured. When it comes to measuring shapes and figures, mensuration comes in handy. It works with both 2-D and 3-D geometrical shapes. It ultimately helps solve practical problems regarding area and depth. So whether it is building a bridge or storing chemicals, Mensuration has its varied purposes.