Chemical Effects of Electric Current
Some Natural Phenomena
Force and Pressure
Pollution of Air and Water
Cell Structure and Functions
Crop Production and Management
Friction
Reproduction in Animals
Synthetic Fibres and Plastics
Coal and Petroleum
Combustion and Flame
Reaching the Age of Adolescence
Conservation and Flame
Light
Materials: Metals and Non-Metals
Microorganisms: Friend and Foe
Sound
Stars and the Solar System
Conservation of Plants and Animals

Algebraic Expressions and Identities
Data Handling
Direct and Inverse Proportions
Linear Equations in One Variable
Visualising Solid Shapes
Introduction to Graphs
Understanding Quadrilaterals
Factorisation
Cubes and Cube Roots
Comparing Quantities
Practical Geometry
Rational Numbers
Squares and Square Roots
Exponents and Powers
Mensuration
Playing with Numbers

Understanding Quadrilaterals

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Q 1. The number of sides of a regular polygon whose each exterior angle has a measure of 45°, is

5

6

7

8

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Q 2. If the sides of a quadrilateral are produced in order, the sum of the four exterior angles so formed is

180°

360°

540°

720°

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Q 3. The measure of each angle of a convex quadrilateral is

less than 180°

equal to 180°

greater than 180°

none of these

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Q 4. The angle of a quadrilateral are in the ratio 1 : 2 : 3 : 4. The largest angle is

36°

72°

108°

144°

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Q 5. In the figure, the measure of {tex}\angle c{/tex} is

65°

115°

135°

125°

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Q 6. A quadrilateral has three acute angles each measuring 70°. The measure of fourth angle is

140°

150°

105°

120°

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Q 7. If the angle of a quadrilateral are x°, (x - 10)°, (x + 30)° and 2x°, then the greatest angle is

136°

180°

68°

148°

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Q 8. The measures of two angles of a quadrilateral are 115° and 45° and the other two angles are equal. The measure of each of the equal angles is

200°

120°

100°

160°

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Q 9. In a square PQRS, the diagonals bisect at T. Then {tex}\triangle PTQ{/tex} is.

An equilateral triangle

An isosceles but not right angled

A right angled but not isosceles

An isosceles right angled

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Q 10. A diagonal of a rectangle is inclined to one side of the rectangle at 35°. The acute angle between the diagonals is

35°

45°

70°

55°

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Q 11. In fig. ABCD is a rhombus. The value of y- x is

40°

50°

20°

10°

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Q 12. The sum interior angles of a hexagon is

180°

360°

540°

720°

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Q 13. The diagonals of a rhombus ABCD intersect at O, AO = 3 cm, BO = 4 cm then, length of BC is

6 cm

8 cm

5 cm

none.

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Q 14. A quadrilateral whose angles are equal but the only adjacent side are equal, then the quadrilateral is a

square

rectangle

rhombus

parallelogram

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Q 15. The adjacent angles of a parallelogram are in the ratio 4 : 5, then the measure of the adjacent angles is

40°, 50°

80°, 80°

100°, 100°

80°, 100°

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Q 16. One of the diagonals of a rhombus is of the same length as of the side of the rhombus. The angles of the rhombus measure.

80°, 100°

60°, 80°

90°, 90°

60°, 120°

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Q 17. Which of the following is not true ?

A plane figure formed by joining a number of points without lifting the pencil from the paper and without retracting any portion of the drawing other then a single point is called a curve.

a simple closed curve made up of only line segments is called a polygon.

is a figure of closed curve.

None of these

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Q 18. Adjacent sides of a polygon are

any two sides of the polygon

any two sides connecting two non-consecutive vertices of a polygon

any two sides with a common vertex

None of these

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Q 19. Adjacent vertices are

uncommon vertices of two adjacent sides of a polygon

end points of the same side of a polygone

end points of the diagonal of a polygon

none of these

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Q 20. In the given figure

point A and B are in the interior of the curve

point B and C are at the exterior of the curve

point A is at the exterior of the curve and point C is in the interior of the curve

point A is in the interior of the curve and points C at the exterior of the curve

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Q 21. Which of the following is not true ?

a polygon is a convex polygon if the line segment joining any two points inside it lies completely inside the polygon

if a polygon has a position of its diagonal in its exterior then it is known as a concave polygon

a polygon having all sides and all angles equal is a regular polygon

rhombus is a regular polygon

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Q 22. Which of the following is not true?

equilateral triangle is a regular polygon

square is a regular polygon

rectangle is a regular polygon

a regular polygon is both equiangular and equilateral.

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Q 23. Which of the following is not true

every trapezium is a parallelogram but every parallelogram is not a trapezium

opposite sides of a parallelogram are not equal

opposite angles of a parallelogram are equal

both (A) and (B)

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Q 24. How many diagonals does a regular hexagon have ?

2

0

4

9

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Q 25. The angle sum of a convex polygon with number of sides 7 is

900°

1080°

1440°

720°

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