Basic geometrical ideas

Choose the correct answer. A Point

• A : determines a location

• B : is a tiny dot

• A & B

• None of the above

Line segment has two end points A and B

• True

• False

Do you think you can draw a complete picture of a line? Why?

• Yes, I can draw a line using two points A and B

• No, Because it extends indefinitely in both directions.

Define intersecting lines :

• Two lines have same starting point

• Two lines have one common point

• Two line have same ending point

• Two line have same number of points

Ray is a portion of a line

• True

• False

Ray has both starting point and ending point

• True

• False

If  $\overrightarrow{PQ}$  is a ray,  
(a) What is its starting point? 
(b) Where does the point Q lie on the ray? 
(c) Can we say that Q is the starting point of this ray? 

• (a) P,  (b) End point of the ray, (c) Yes

• (a) P, (b) A point on the path of the ray, (c) Yes

• (a) P, (b) A point on the path of the ray, (c) No

• (a) P, (b) A point on the end of the ray, (c) No

A point has

• 1 cm length

• Infinite length

• No length

• None of these

A line segment has

• Infinite length

• Fixed length

• No length

• None of these

A Ray has

• One end point

• Two end point

• Many end point

• None of these