All the Maths Formulas for Mensuration

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Here are some of the important formulas for mensuration in mathematics:

  1. Area of a Circle: πr2, where r is the radius of the circle. The formula for finding the area of a circle is π times the radius squared. For example, if the radius of a circle is 5 cm, then the area would be 25π square cm.
  2. Circumference of a Circle: 2πr, where r is the radius of the circle. The formula for finding the circumference of a circle is 2 times π times the radius. For example, if the radius of a circle is 5 cm, then the circumference would be 10π cm.
  3. Area of a Rectangle: l x b, where l is the length and b is the breadth of the rectangle. The formula for finding the area of a rectangle is the product of its length and breadth. For example, if the length of a rectangle is 6 cm and its breadth is 4 cm, then the area would be 24 square cm.
  4. Perimeter of a Rectangle: 2(l + b), where l is the length and b is the breadth of the rectangle. The formula for finding the perimeter of a rectangle is 2 times the sum of its length and breadth. For example, if the length of a rectangle is 6 cm and its breadth is 4 cm, then the perimeter would be 20 cm.
  5. Area of a Square: s2, where s is the side of the square. The formula for finding the area of a square is the side squared. For example, if the side of a square is 5 cm, then the area would be 25 square cm.
  6. Perimeter of a Square: 4s, where s is the side of the square. The formula for finding the perimeter of a square is 4 times the side. For example, if the side of a square is 5 cm, then the perimeter would be 20 cm.
  7. Area of a Triangle: (1/2)bh, where b is the base and h is the height of the triangle. The formula for finding the area of a triangle is (1/2) times the base times the height. For example, if the base of a triangle is 6 cm and its height is 4 cm, then the area would be 12 square cm.
  8. Volume of a Cube: s3, where s is the side of the cube. The formula for finding the volume of a cube is the side cubed. For example, if the side of a cube is 5 cm, then the volume would be 125 cubic cm.
  9. Volume of a Rectangular Prism: l x b x h, where l, b and h are the length, breadth and height of the rectangular prism respectively. The formula for finding the volume of a rectangular prism is the product of its length, breadth, and height. For example, if the length of a rectangular prism is 6 cm, its breadth is 4 cm, and its height is 5 cm, then the volume would be 120 cubic cm.
  10. Volume of a Sphere: (4/3)πr3, where r is the radius of the sphere. The formula for finding the volume of a sphere is (4/3) times π times the radius cubed. For example, if the radius of a sphere is 5 cm, then the volume would be (4/3) x π x 125 cubic cm.
  11. Surface area of Sphere: 4πr2, where r is the radius of the sphere. The surface area of a sphere is the total area of its outer surface. It is equal to four times the area of a great circle of the sphere, which is a circle that passes through the center of the sphere and has the same diameter as the sphere. For example: Suppose the radius of a sphere is 5 cm. Surface area = 4πr2 = 4π x 52 = 4π x 25 = 100π square cm. So, the surface area of the sphere with a radius of 5 cm is 100π square cm.

Mensuration Formulas

Mensuration Formulas

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CBSE CLASS XII Related Questions

  • 1.

    Check whether the function \[ f(x)= \begin{cases} \dfrac{|x-3|}{2(x-3)}, & x<3,\\[6pt] \dfrac{x-6}{6}, & x\geq 3 \end{cases} \] is continuous at \(x=3\) or not. 


      • 2.

        If \[ B(\operatorname{adj} B)= \begin{bmatrix} \frac{1}{3} & 0 & 0\\ 0 & \frac{1}{3} & 0\\ 0 & 0 & \frac{1}{3} \end{bmatrix}, \] then the value of \[ \det(B^{-1}) \] is: 

          • \(\frac{1}{3}\)
          • \(\frac{1}{9}\)
          • \(3\)
          • \(9\)

        • 3.
          For \[ f(x)=x+\frac{1}{x}, \quad x\neq 0. \]

            • local maximum value is 2
            • local minimum value is \( -2 \)
            • local maximum value is \( -2 \)
            • local minimum value \( < \) local maximum value

          • 4.

            Sports car racing is a form of motorsport which uses sports car prototypes.The competition is held on special tracks designed in various shapes. 

            The equation of a sports car racing track is given as: \[ f(x)= \begin{cases} x^4-4x^2+4, & 0\leq x<3,\\ x^2+40, & x\geq 3 \end{cases} \] Based on this information:


              • 5.
                Find: \[ \int \frac{x^2}{(x^2+9)(x^2+16)}\,dx \]


                  • 6.
                    Assertion (A) : In an experiment of throwing an unbiased die, the probability of getting a prime number given that number appearing on the die being odd is \( \frac{2}{3} \).
                    Reason (R) : For any two events \( A \) and \( B \), \( P(A|B) = \frac{P(A \cup B)}{P(B)} \).

                      • Both Assertion (A) and Reason (R) are true and the Reason (R) is the correct explanation of the Assertion (A).
                      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
                      • Assertion (A) is true and Reason (R) is false.
                      • Assertion (A) is false and Reason (R) is true.
                    CBSE CLASS XII Previous Year Papers

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