Chapter 1

Question 1

Formula for distance between 2 points.

Answer 1

d= sq. root of (x2-x1)sq.+(y2-y1)sq.

Question 2

How to find distance on a # line?

Answer 2

Count from # to #.

Question 3

What is precision of measurement?

Answer 3

1/2 the smallest unit on the ruler

Question 4

What type of lines share NO points?

Answer 4

parallel

Question 5

What is a ray?

Answer 5

1/2 a segment and side of angles

Question 6

Measurement of a right angle?

Answer 6

90degrees

Question 7

Obtuse measurement?

Answer 7

more than 90, less than 180 degrees

Question 8

acute angle measurement?

Answer 8

less than 90 degrees

Question 9

List 4 ways to name angles.

Answer 9

angle sign: vertex, 2 pts w/ vertex in middle, # of angle

Question 10

What is an angle bisector?

Answer 10

ray that divides angle into 2 congruent angles

Question 11

define adjacent angles

Answer 11

in the same plane,share a vertex/side, NO common sides

Question 12

define Vertical angles

Answer 12

2 non-adjecent angles formed from intersecting lines(like an X)

Question 13

define linear pair.

Answer 13

adjacent angles w/ non common sides

Question 14

What is a complementary angle?

Answer 14

2 angles who = 90 degrees

Question 15

What is a supplementary angle?

Answer 15

2 angles that = 180 degrees

Question 16

Formula for midpoint:

Answer 16

(x_1 + x_2 divided by 2, y_1 +y_2 divided by 2)

Question 17

what is the pythagorean theorem?

Answer 17

a squared +b squared= c squared

Question 18

Midpoint with other value formula:

Answer 18

Write down each pt and its coordinate. Include the unknown pt. Solve algebraically, find unknown coordinate.

Question 19

midpoint on a # line

Answer 19

a+b over 2

Question 20

How do you find midpoint on a graph? (with vertical and horizontal lines)

Answer 20

Count from the 2 endpoints down to the middle. Record the coordinates.

Question 21

If the line is diagonal, how do you find the midpoint?

Answer 21

you are actually finding the average (mean) of the x-coordinates and the average (mean) of the y-coordinates.