1 Elementary Shapes

Question 1

What are the three ways to compare line segments?

Answer 1

1. By observation.
2. Using Tracing Paper
3. Ruler and Divider

Question 2

What is complete angle, right angle, straight angle?

Answer 2

Complete angle - One revolution which makes 360 degrees. If we stand in direction and make a complete angle, we end up in the same direction.
Right angle - one fourth of the complete angle is right angle which makes 90 degrees. If we stand in one direction and make a right angle (Clockwise or anticlockwise) we end up in the adjacent direction.
Straight angle - Half revolution makes one straight angle which is 180 degrees. Two right angles make one straight angle. If stand in one direction and make a straight angle, we end up in opposite direction.

Question 3

What is acute, obtuse and reflex angle?

Answer 3

Acute - Less than right angle.
Obtuse - Greater the right angle but less than straight angle.
Reflex angle - Greater than one straight angle but less than one complete angle.

Question 4

What is a Quadrant?

Answer 4

Section that covers a right angled space

Question 5

What is RA tester?

Answer 5

It is an improvised tester made out of any shape to find out a right, acute, obtuse, straight, reflex and complete angle.

Question 6

Is an edge of a shape has to a staright line like line segment or can it be a curved? If yes, give a shape that have curved edge?

Answer 6

Edge can be curved also. Protractor has a curved edge.

Question 7

What is the tool we use for measuring angles?

Answer 7

Protractor

Question 8

Can we use divider to measure angles?

Answer 8

No

Question 9

What are perpendicular lines?

Answer 9

If two lines meet at a point and angle between them is right angle

Question 10

What is a perpendicular bisector?

Answer 10

If a line intersects another line at mid point with right angle then it is a perpendicular bisector