Measures of the two angles between hour and minutes hands of a clock at 9 O' clock are

1

(a)

60°, 300°

(b)

270°, 90°

(c)

75°, 285°

(d)

30°, 330°

If a bicycle wheel has 48 spokes, then the angle between a pair of two consecutive spokes is

1

(a)

\(\left( 5\frac { 1 }{ 2 } \right) ^{ 0 }\).

(b)

\(\left( 7\frac { 1 }{ 2 } \right) ^{ 0 }\).

(c)

\(\left( \frac { 2 }{ 11 } \right) ^{ 0 }\).

(d)

\(\left( \frac { 2 }{ 15 } \right) ^{ 0 }\).

Number of vertices in cylinder are

1

(a)

2

(b)

0

(c)

3

(d)

4

The angle measure for one-fourth revolution is

1

(a)

90°

(b)

360°

(c)

180°

(d)

none of these.

Through what angle measure does the hour hand of a clock turn through, when it goes from 3 to 9?

1

(a)

90°

(b)

360°180° none of these

(c)

180°

(d)

none of these

An angle whose measure is less than that of a right angle is _____

1

(a)

acute angle

An angle whose measure is greater than that of a right angle is _______

1

(a)

obtuse angle

An angle whose measure is the sum of the measures of two right angles is ______

1

(a)

straight angle

When the sum of the measures of two angles is that of a right angle, then each one of them is ______.

1

(a)

acute angle

When the sum of the measures of two angles is that of a straight angle and if one of them is acute, then the other should be _______

1

(a)

obtuse angle

If m\(\angle A\) = 53° and m \(\angle B\) = 35°, then m \(\angle A\) > m \(\angle B.\)

1

(a) False

(b) True

A scalene triangle has unequal measure of angle and also has unequal length of sides.

1

(a) False

(b) True

Sum of interior angles of scalene triangle and equilateral triangle are different.

1

(a) True

(b) False

In a ΔABC, \(\angle B = 90°\) and AB = BC. Then, ΔABC is right angled isosceles triangle.

1

(a) False

(b) True

In obtuse angled triangle, there are two angles whose measure is greater than 90°.

1

(a) True

(b) False

If AB丄CD, then should we say that CD丄AB also?

2

(a)

Yes

Is there any other alphabet which illustrates perpendicularity?

2

(a)

Yes.L.

Consider the edges of a post card. Are the edges perpendicular?

2

(a)

Yes.

What is the disadvantage in comparing line segments by mere observation?

2

(a)

Why is it better to use a divider than a ruler, while measuring the length of a line segment

2

(a)

Will the lengths of line segment AB and line segment BC make the length of line segment AC in figure?

4

(a)

Is it possible for the same, angle to have two different measures?

4

(a)

Using the information given, name the right angles in each part of figure.
BA 丄 BD 

4

(a)

Draw five other situations of one-fourth, half and three-fourth revolution on a clock.

4

(a)

Classify each one of the following angles as right, straight, acute, obtuse or refles.

4

(a)