Angle

Q. The time is 3 o'clock. What is the angle between the two hands of the clock in degrees?

1. 0°
2. 60°
3. 90°
4. 180°

Q. In a acute angle triangle ABC, if $sin(A+B-C)=\frac{1}{2}$ and $cos(B+C-A)=\frac{1}{\sqrt{2}}$.

Q.

How many degrees are there in two right angles?

Q. A/An ___ is the union of two rays with the same end point.

Q.

How many degrees are there in $1$ right angle ?

Q. The number of angles in the given figure is

1. 3
2. 4
3. 5
4. 6

Q.

What is the reference angle for $240°$? Put your answer in degrees and in radians.

Q.

What is the angle name for one-fourth revolution?

Q.

Question 55

Find out the incorrect statement, if any in the following.
An angle is formed, when we have

a) Two rays with a common end point.

b) Two line segments with a common end point.

c) A ray and a line segment with a common end point.

Q. Find the number of angles in the given figure.

Q.

An angle formed by two opposite rays is called :

1. Zero angle

2. Complete angle

3. Right angle

4. Straight angle

Q.

What is the angle name for one-fourth a revolution?

Q.

Two rays of an angle are called arms of the angle.

1. True
2. False

Q.

When three lines intersect each other at three different points, then how many angles will be formed?

Q. Two rays starting from a common point form a/an .

Q. Two angles can have exactly five points in common.

True
False

Q. An angle is formed when ___ rays have a common endpoint.

1. 2

Q.

What is an angle? Mention all the elements of an angle.[1 MARK]

Q.

Question 3: Draw rough diagrams of two angles such that they have:
(a) Three points in common

Q.

Question 2 (e)

Say True or False:

If m$\angle A={53}^{\circ }$ and m$\angle B={35}^{\circ }$ then $m\angle A>m\angle B.$

Q. What fraction of a complete rotation does the hour hand of a clock turn through, when it goes from 4 to 11?

1. $1$
2. $\frac{7}{12}$
3. $\frac{1}{2}$
4. $\frac{3}{4}$

Q.

What is the measure of (i) a right angle? (ii) a straight angle?

Q. An angle has:

1. two arms
2. one arm
3. None of the above
4. three arms

Q.

Can you construct a triangle whose measures are $45°,60°$ and $73°$?

Q.

Question 58

If two rays intersect, will their point of intersection be the vertex of an angle, of which the rays are the two sides?

Q. For angle given below, write the name of the vertex, the names of the arms and the name of the angle.

$\left(i\right)$

Q.

Question 63

What conclusion can be drawn from each part, of the figure?

a) DB is the bisector of $\angle ADC$.

b) BD bisects $\angle ABC$.

c) DC is the bisector of $\angle ADB,CA\perp DAandCB\perp DB$.

Q. In the given figure, AOC is a straight line. If angle AOB=50^°, angle AOE=90^° and angle COD=25^°. Find the measures of:

(iii).Obtuse angle $BOD$

Q.

Question 2: In the given diagram, name the point(s):

On $\angle EOF$

Q.

How do you find the cross product of an angle$?$