📘 Class 8 – Maths
Q. What are rational numbers?
Ans: Numbers that can be written in the form p/q where q is not zero.
Q. Give an example of rational number.
Ans: 3/5 is a rational number.
Q. What is a linear equation?
Ans: An equation with one variable of degree one.
Q. What is transpose of a matrix?
Ans: Interchanging rows and columns of a matrix.
Q. What is square?
Ans: A number multiplied by itself.
Q. Formula for area of triangle?
Ans: ½ × base × height
Q. Value of π?
Ans: 3.1416
Q. Pythagoras theorem?
Ans: a² + b² = c²
Q. Perimeter of square?
Ans: 4 × side
Q. Volume of cube?
Ans: a³
Q. Solve: 2x + 5 = 15
Ans: x = 5
Q. Area of circle?
Ans: πr²
Q. Circumference of circle?
Ans: 2Ï€r
Q. Factorize x² − 9
Ans: (x − 3)(x + 3)
Q. Square root of 144?
Ans: 12
Q. Formula for area of triangle?
Ans: ½ × base × height
Q. Value of π?
Ans: 3.1416
Q. Pythagoras theorem?
Ans: a² + b² = c²
Q. Perimeter of square?
Ans: 4 × side
Q. Volume of cube?
Ans: a³
Q. Solve: 2x + 5 = 15
Ans: x = 5
Q. Area of circle?
Ans: πr²
Q. Circumference of circle?
Ans: 2Ï€r
Q. Factorize x² − 9
Ans: (x − 3)(x + 3)
Q. Square root of 144?
Ans: 12