Introduction to Euclid's Geometry + Lines and Angles

What is a line?

• A straight set of points that goes on forever in both directions
• A curved set of points that goes on forever in both directions
• A straight set of points that goes on forever in one direction only
• A straight set of points that does not go on forever in either direction

What is a line segment?

• A set of points that goes on forever in both directions
• A curved line that goes on in one direction forever
• A part of a line between two endpoints

What is the term for a dot that marks a location or place in space?

• point
• line
• line segment
• ray

What does the image show? 

• a ray
• a line
• a line segment
• a point

Say 'TRUE' or 'FALSE'
If two circles are equal, then their radii are equal

• TRUE
• FALSE

There is a unique line passing through 2 given points

• True

• False

If x = y then 2x = 2y. Which is the axiom supporting the given statement

• Things which are equal to the same thing are equal to one another.

• Things which are double of the same things are equal to one another.

• Things which coincide with one another are equal to one another.

• If equals are added to equals, the wholes are equal.

Which of the following needs a proof?

• Theorem
• Axiom
• Definition
• Postulate

It is known that if p+q=11 then p+q+r=11+r. The Euclid axioms that illustrates this statement is

• Things which are equal to the same thing are equal to one another.

• Things which are halves of the same things are equal to one another.

• Things which coincide with one another are equal to one another.

• If equals are added to equals, the wholes are equal.

What type of angle is this? 

• acute
• obtuse
• right