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3. How many sides does a regular polygon have if the measure of an exterior angle is 24°? 3. How many sides does a regular polygon have if the measure of an exterior angle is 24°? October 11, 2020 Category: Chapter 3 - Understanding Quadrilaterals , Maths , NCERT Class 8 ,

4. Examine the table. (Each figure is divided into triangles and the sum of the angles deduced from that.) What can you say about the angle sum of a convex polygon with number of sides? (a) 7 (b) 8 (c) 10 (d) n 2. How many diagonals does each of the following have? a) A [...]

3. What is the sum of the measures of the angles of a convex quadrilateral? Will this property hold if the quadrilateral is not convex? (Make a non-convex quadrilateral and try!) 3. What is the sum of the measures of the angles of a convex quadrilateral? Will this property hold if the quadrilateral is not [...]

2. How many diagonals does each of the following have? a) A convex quadrilateral (b) A regular hexagon (c) A triangle 2. How many diagonals does each of the following have? a) A convex quadrilateral (b) A regular hexagon (c) A triangle October 11, 2020 Category: Chapter 3 - Understanding Quadrilaterals , Maths , NCERT [...]

1. Given here are some figures. Classify each of them on the basis of the following. (a)Simple curve (b) Simple closed curve (c) Polygon (d) Convex polygon (e) Concave polygon 1. Given here are some figures. Classify each of them on the basis of the following. (a)Simple curve (b) Simple closed curve (c) Polygon (d) [...]

7. The denominator of a rational number is greater than its numerator by 8. If the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is 3/2. Find the rational number. 7. The denominator of a rational number is greater than its numerator by 8. If the numerator is [...]

Consider a rain drop falling at terminal speed. For what radius (R) of the drop can we disregard the influence of gravity on its shape? Surface tension and density of water are T and ρ respectively. Consider a rain drop falling at terminal speed. For what radius (R) of the drop can we disregard the [...]

Solve the following equations. 5. (7y + 4)/(y + 2) = -4/3 Solve the following equations. 5. (7y + 4)/(y + 2) = -4/3 October 11, 2020 Category: Chapter 2 - Linear Equations in One Variable , Maths , NCERT Class 8 ,

There is an air bubble of radius 1.0 mm in a liquid of surface tension 0.075 N/m and density 1000 kg/m^3 . The bubble is at a depth of 10.0 cm below the free surface of a liquid. By what amount is the pressure inside the bubble greater than the atmospheric pressure? A glass plate [...]

Solve the following equations. 4. (3y + 4)/(2 – 6y) = -2/5 Solve the following equations. 4. (3y + 4)/(2 – 6y) = -2/5 October 11, 2020 Category: Chapter 2 - Linear Equations in One Variable , Maths , NCERT Class 8 ,