CBSE Class 6

On this page, you will find Practical Geometry Class 6 Notes Maths Chapter 14 Pdf free download. CBSE NCERT Class 6 Maths Notes Chapter 14 Practical Geometry will seemingly help them to revise the important concepts in less time.

CBSE Class 6 Maths Chapter 14 Notes Practical Geometry

Practical Geometry Class 6 Notes Conceptual Facts

1. The shortest distance between two point is called line segment.

2. Length of the line segment can be measured with the help of ruler and divider.

3. Circle can be drawn with the help of compass.

4. Divider is used to compare the lengths of two line segments.

5. To measure angles, we use protractor.

6. To draw perpendiculars and parallel lines, we use set squares.

On this page, you will find Symmetry Class 6 Notes Maths Chapter 13 Pdf free download. CBSE NCERT Class 6 Maths Notes Chapter 13 Symmetry will seemingly help them to revise the important concepts in less time.

CBSE Class 6 Maths Chapter 13 Notes Symmetry

Symmetry Class 6 Notes Conceptual Facts

1. The objects or shapes with evenly balanced proportions are called symmetrical objects or shapes.

2. When a figure can be folded into two halves and both the halves overlap each other, the figure is said to be symmetrical.

3. The line along which the figure is folded is called lines of symmetry.

4. Line of symmetry can be horizontal, vertical or slant.

On this page, you will find Ratio and Proportion Class 6 Notes Maths Chapter 12 Pdf free download. CBSE NCERT Class 6 Maths Notes Chapter 12 Ratio and Proportion will seemingly help them to revise the important concepts in less time.

CBSE Class 6 Maths Chapter 12 Notes Ratio and Proportion

Ratio and Proportion Class 6 Notes Conceptual Facts

1. The comparison of two quantities by division is called ratio.
For example,\(\frac{2}{3}, \frac{1}{2}, \frac{1}{3}, \frac{1}{4}\)etc.

2. We represent the ratio by a symbol V
For example: \(\frac{2}{3}\) = 2:3 or \(\frac{3}{2}\) = 3:2

3. Two quantities can only be compared when they are in the same unit.
For example, 4 cm : 5 cm or \(\frac{3}{2}\) m \(\frac{4}{5}\)m

4. We can get equivalent ratios by multiplying or dividing the numerator and the denominator by the same number. For example, \(\frac{2}{3}=\frac{2 \times 2}{3 \times 2}=\frac{4}{6}=\frac{4 \times 3}{6 \times 3}=\frac{12}{18} \cdot \mathrm{So}, \frac{2}{3}, \frac{4}{6} \text { and } \frac{12}{18}\) are all equivalent ratios.

5. If two ratios are equal, we say that they are in proportions and use the symbol :: or *=’.
For example, 2 : 3 :: 4 : 6 or 2 : 3 = 4 : 6

6. If two ratios are not equal then we say that they are not in proportion.
For example, \(\frac{2}{3} \text { and } \frac{4}{5}\) are not equal ratios. So they are not in proportions.

7. In proportion four quantities are involved. The first and fourth terms are known as extreme and second and third terms are known as middle terms.
For example, 2 : 3 :: 8 : 12 where 2 and 12 are extreme and 3 and 8 are middle terms.

8. Product of extreme terms = product of middle terms.

9. We can use a method in which first we find the value of one unit and then the value of the required number of units. This method is called the unitary method.

On this page, you will find Algebra Class 6 Notes Maths Chapter 11 Pdf free download. CBSE NCERT Class 6 Maths Notes Chapter 11 Algebra will seemingly help them to revise the important concepts in less time.

CBSE Class 6 Maths Chapter 11 Notes Algebra

Algebra Class 6 Notes Conceptual Facts

1. In algebra, we generally use the letters like ‘a’, ‘b’, ‘c’ ‘d’, ‘x’, ‘y’, ‘z’ or any other symbol to represent an unspecified number.

2. These letters are called ‘literals’ or ‘variables’.

3. Numbers such as 2, 5, 6, -7, 8 etc. are called ‘constants’.

4. The literal numbers obey the four fundamental operations i.e., “+’, ‘x’, V.

5. We can establish some rules in making few geometrical shapes using matchsticks such as 2n, 3n or 5n
where n is variable and 2, 3, 5 are constants.

6. Rules of Arithmetics can also be represented by algebraic symbols.

• Commutative law of addition: a + b = b + a
• Commutative law of multiplication a x b = b x a
• Distributive law over addition a x (b + c) = a x b + a x c
• Associative law of addition (a + b) + c – a + (b + c)

7. Algebraic Expression: Expression like 4x + 5, y – 3, 4z – 3 are called as algebraic expression where x-, y and 2 are variables.

8. An algebraic equation has two sides, left hand side (LHS) and right hand side (RHS), with equal sign (=) between the two sides.

9. The value of the variable in an algebraic equation which satisfies the equation is called a solution to the equation.

On this page, you will find Mensuration Class 6 Notes Maths Chapter 10 Pdf free download. CBSE NCERT Class 6 Maths Notes Chapter 10 Mensuration will seemingly help them to revise the important concepts in less time.

CBSE Class 6 Maths Chapter 10 Notes Mensuration

Mensuration Class 6 Notes Conceptual Facts

1. Perimeter is the distance covered along the boundary formed by the closed figures.

2. Perimeter of rectangle = 2 (length + breadth)

3. Perimeter of square = 4 x length of the side

4. Perimeter of equilateral triangle = 3 x length of each side

5. Area of a rectangle = length x breadth

6. Area of a square = side x side

7. Unit of perimeter = cm or m or km

8. Unit of area = sq cm or sq m or sq km (cm² or m² or km²)