unit 1

Question 1

what is a point?

Answer 1

a point is a location in space

Question 2

do points have thickness or width?

Answer 2

no, points do not have thickness or width

Question 3

do you use capital or lower case letter for points?

Answer 3

always use capital letters for naming points
(ex: point A or A)

Question 4

what is a line?

Answer 4

a line is made up of infinitely many points

Question 5

how many points are needed to form a line?

Answer 5

any two points from a line

Question 5

collinear points–

Answer 5

points that lie on that same line

Question 5

do lines have thickness or width?

Answer 5

no, lines do not have thickness or width

Question 6

how do you name a line?

Answer 6

name a line by any two points on the line, or a lowercase or italic letter.
(ex: line xy)

Question 7

non-collinear points–

Answer 7

points that do not lie on the same line

Question 8

how many points does it take for a point to be non-collinear?

Answer 8

must be at least three points

Question 9

what is a plane?

Answer 9

a plane is a flat surface made up of points

Question 10

how many points make up a plane?

Answer 10

any three points make up a plane (non-collinear)

Question 11

can a plane stop?

Answer 11

no, a plane extends indefinitely in all directions

Question 12

coplanar points–

Answer 12

points that line on the same plane

Question 13

non-coplanar points–

Answer 13

points that do not lie on the same plane

Question 14

at least how many points does it to be non-coplanar?

Answer 14

must be at least four points

Question 15

true or false: two lines intersect at a point

Answer 15

true

Question 16

true or false: two planes intersect at a line

Answer 16

true

Question 17

what is a midpoint?

Answer 17

the midpoint of a segment is a point that divides the segment into two congruent segments

Question 18

what is it called when line, ray, or segment that intersects a segment at its midpoint?

Answer 18

it is said to bisect the segment and is called the bisector of the segment

Question 19

what does it mean to partition?

Answer 19

to partition means to divide or seperate a line segment into smaller segments and compare their lengths as a ratio

Question 20

how are angles formed?

Answer 20

an angle is formed by two rays with a common endpoint, the vertex.

Question 21

what are the rays called of an angle?

Answer 21

the rays are called the sides

Question 22

how do you name an angle?

Answer 22

name an angle using three capital letters where the middle litter must always s represent the vertex

Question 23

what if there is only one angle located at the vertex?

Answer 23

then you use a single letter

Question 24

what letter to use when referring to the measure of an angle?

Answer 24

use a lowercase m

Question 25

acute angles–

Answer 25

m > 90°

Question 26

obtuse angles–

Answer 26

m > 90° and m < 180°

Question 27

right angle–

Answer 27

m = 90°

Question 28

straight angle–

Answer 28

m = 180°

Question 29

what are angle bisectors?

Answer 29

a ray that divides an angle into two congruent angles

Question 30

what are perpendicular lines?

Answer 30

two lines that intersect at a right angle

Question 31

what is a perpendicular bisector?

Answer 31

a line, segment, or ray perpendicular to a segment at its midpoint

Question 32

what are vertical angles?

Answer 32

two angles across from each other on intersecting lines. they are always congruent!

Question 33

what are adjacent angles?

Answer 33

two angles that are next to each other and share a common side

Question 34

what are complementary angles?

Answer 34

any two angles whose sum is 90°

Question 35

what are supplementary angles?

Answer 35

any two angles whose sum is 180°