Chapter – 11: Perimeter and Area
Exercise 11.1 1. The Length and the breadth of a rectangular piece of land are 500 m and 300 m, respectively. Find (i) Its area (ii) the cost of the land, if 1 m2 of the land costs…
Chapter – 12: Algebraic Expressions
Exercise 12.1 1. Get the algebraic expressions in the following cases using variables, constants and arithmetic operations. (i) Subtraction of z from y. Solution: – = Y – z (ii) One-half of the sum of numbers x…
Chapter – 13: Exponents and Powers
Exercise 13.1 1. Find the value of: (i) 26 Solution: – The above value can be written as, = 2 × 2 × 2 × 2 × 2 × 2 = 64 (ii) 93 Solution: – The…
Chapter – 14: Symmetry
Exercise 14.1 1. Copy the figures with punched holes and find the axes of symmetry for the following: (a) Solution: – A figure has a line of symmetry, if there is a line about which the figure…
Chapter – 15: Visualizing Solid Shapes
Exercise 15.1 1. Identify the nets which can be used to make cubes (cut out copies of the nets and try it): (i) Solution: – The given net cannot be folded as cube. Because, it can be…
Chapter – 7: Congruence of Triangles
Exercise 7.1 1. Complete the following statements: (a) Two-line segments are congruent if ___________. Solution: – Two line segments are congruent if they have the same length. (b) Among two congruent angles, one has a measure of…
