Module 1.1 Segment Length and Midpoints

Question 1

Point

Answer 1

A specific location represented by a “dot”.

Question 2

Line

Answer 2

A connected straight path that continues forever in both directions.

Question 3

Plane

Answer 3

A flat surface that has not thickness and extends forever in both directions.

Question 4

Segment

Answer 4

A portion of a line that includes two endpoints and all the points in between.

Question 5

Midpoint

Answer 5

Point that divides the segment into two equal lengths.

Question 6

Ray

Answer 6

A portion of a line that starts at an endpoint and continues forever in one direction.

Question 7

Segment Bisector

Answer 7

A line, ray or other figure that passes through the midpoint of a segment.

Question 8

Collinear

Answer 8

Point on the same line.

Question 9

Coplanar

Answer 9

Points that lie in the same plane.

Question 10

Parallel Lines

Answer 10

Lines in the same plane that do not intersect.

Question 11

Perpendicular Lines

Answer 11

Lines that intersect at a right angle.

Question 12

Postulate

Answer 12

A statement that is accepted as true without proof.

Question 13

Does the order of the two points matter when naming a segment, ray or a line?

Answer 13

Order does not matter for a line or a segment. It does matter for a ray. For a ray you start with the letter of the endpoint.

Question 14

How do you find the distance between two points?

Answer 14

1. Use the distance formula.

2. Draw a right triangle and use the pythagorean theorem.

Question 15

What is the distance formula in words?

Answer 15

1. Subtract your two x values and square it.
2. Subtract your two y values and square it.
3. Add those two numbers together.
4. Take the square root of that number.

Question 16

How do you find the midpoint of a line segment?

Answer 16

1. Add the two x values and divide by 2 to get the x coordinate.
2. Add the two y values and divide by 2 to get the y coordinate.
3. Write the answer as an ordered pair (x, y).