Right Angle

Q. How many right angles are present at all corners of a cube?

1. 32
2. 24
3. 18
4. 16

Q.

A ship is to reach a place $10°$ south of the west. In what direction should it be steered if declination at the place is $17°$ west?

1. East of Magnetic North at angle $83°$

2. East of Magnetic South at angle $83°$

3. West of Magnetic North at angle $83°$

4. West of Magnetic South at angle $83°$

Q. How many right angles are there at one corner of a cube?

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

Q. Arrange the given shapes in increasing order according to the measure of their angles inside them.

Q. Mohini made each of these shapes with 6 match sticks. Look at the angles inside the given shapes. Are the angles of these shapes with same number of sides same? Explain.

Q.

An angle which is equal to 90 degrees is known as ____.

1. acute angle

2. right angle

3. obtuse angle

4. reflex angle

Q. Name the angle shown below:

1. acute
2. obtuse
3. right
4. None of the above

Q. Arrange the given shapes in order such that the number of angles inside the shapes are in decreasing order.

Q.

Question 26

Fill in the blanks to make the statement true.

The number of right angles in a straight angle is ______ and that in a complete angle is ________.

Q.

Question 47

Name the following angles of the given figure using three letters.

a) $\angle 1$
b) $\angle 2$
c) $\angle 3$
d) $\angle 1$ + $\angle 2$
e) $\angle 2$ + $\angle 3$
f) $\angle 1$ + $\angle 2$+$\angle 3$
g) $\angle CBA$ - $\angle 1$

Q. Consider the image shown below.

Which slide makes a greater angle with the ground?

Q. Find the half and twice of a right angle.

Q. How many acute angles can be seen in the sandwich shown here?

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

Q. At which of the following times is the angle between the hour and minute hands of a clock exactly a straight angle?

1. 03:00
2. 09:00
3. 12:30
4. 06:00

Q.

The principal diagonal of a cube of edge $a$ is _____________ whereas diagonal of its base is
_____________.

Q.

Which best describes a 90 degree angle?

1. Obtuse Angle

2. Reflex Angle

3. Acute Angle

4. Right Angle

Q.

What is the measure of the angles in degrees between the following

Consider all angles to be formed by clockwise rotation.

West and North

Q. Identify a right angle from the following figures.

1. 

2. 

3. 

4. 

Q.
Angle B is greater than angle A

1. True
2. False

Q. Using the information given, name the right angles in each part of the given figures:
(a) BA $\perp$ BD




(b) RT $\perp$ ST


(c) AC $\perp$ BD





(d) RS $\perp$ RW




(e) AC $\perp$ BD




(f) AE $\perp$ CE



(g) AC $\perp$ CD





(h) OP $\perp$ AB





[4 MARKS]

Q. How many right angles are there at one corner of a cube?

1. $3$
2. $4$
3. $6$
4. None of these

Q. The number of right angles in the word below is:

1. 5

Q.

An angle which is equal to 90 degrees is known as ____.

1. obtuse angle

2. right angle

3. reflex angle

4. acute angle

Q. Select all the acute angles.

1. 120°
2. 90°
3. 25°
4. 54°
5. 68°
6. 145°
7. 12°
8. 88°
9. 168°