7 NCERT MATH MOST IMPORTANT QUESCTION

Q1. The solid whose net is given below is: 1) 2) 3) 4) Solution Q2. 4 congruent triangles are placed along the sides of a square such that side of the square is equal to base of the triangle. If we join the vertices of the triangle it becomes a 1) Cuboid 2) Pyramid 3) Cylinder 4) Prism Solution Fold the triangles placed along the sides of the square, from outside to inside. It will take the shape of pyramid with square base. Q3. A cube is painted red along all its faces and then divided into 27 smaller identical pieces. How many of the resultant pieces will have no face painted? ...

Q1. 1) 2) 3) 4) Solution Q2. Draw a triangle with one line of symmetry and rotational symmetry of order one. Solution The triangle is as below: The line of symmetry is: Clearly the figure has rotational symmetry of order one only. Q3. Find the number of lines of symmetry of the following figures: (i) A circle (ii) A rhombus (iii) An equilateral triangle (iv) A parallelogram Solution Number of lines of symmetry are: (i) A circle, infinite lines of symmetry (ii) A rhombus, two lines of symmetry (iii) An equilateral triangle, three lines of symmetry (iv) A parallelogram, no line of symmetry Q4. Colour the square boxes assuming the dark brown line to be a mirror line. Solution After colouring the square boxes, the required image is as below: Q5. Whic...