Unit 1: Basics of Geometry

Question 1

What has no dimensions and is represented as a dot?

Answer 1

Point

Question 2

It has one dimension and is represented with two arrowheads, but extends without end.
Through any two points, there is exactly one.
You can use any two points on it to name it.
What is it?

Answer 2

Line

Question 3

It has two dimensions represented by a shape that looks like a floor or a wall, but extends without end.
Through any three points not on the same line, there is exactly one.
You can use three points that are not on the same line to name it.
What is it?

Answer 3

Plane

Question 4

What do we call points that all lie on the same line?

Answer 4

Collinear Points

Question 5

What do we call points that lie on the same plane?

Answer 5

Coplanar Points

Question 6

It has endpoints on both ends.
What is it?

Answer 6

Line Segment

Question 7

It has one endpoint and one arrow on the ends.
What is it?

Answer 7

Ray

Question 8

Written: d=√((x_2-x_1)²+(y_2-y_1)²)
What is it?

Answer 8

Distance Formula

Question 9

Line segments that have the same length are called _______.

Answer 9

Congruent Segments

Question 10

What is this?
x2 - x1 = AB

Answer 10

Ruler Postulate

Question 11

The ______ of a segment is the point that divides the segment into two congruent segments.

Answer 11

Midpoint

Question 12

A _______ ________ is a point, ray, line, line segment, or plane that intersects the segment at its midpoint.

Answer 12

Segment Bisector

Question 13

What is this?
(x1 + x2)/2 , (y1 +y2)/2

Answer 13

Midpoint Formula

Question 14

What polygon has 3 sides?

Answer 14

Triangle

Question 15

What polygon has 4 sides?

Answer 15

Quadrilateral

Question 16

What polygon has 5 sides?

Answer 16

Pentagon

Question 17

What polygon has 6 sides?

Answer 17

Hexagon

Question 18

What polygon has 7 sides?

Answer 18

Heptagon

Question 19

What polygon had 8 sides?

Answer 19

Octagon

Question 20

What polygon has 9 sides?

Answer 20

Nonagon

Question 21

What polygon has 10 sides?

Answer 21

Decagon

Question 22

What polygon has 12 sides?

Answer 22

Dodecagon

Question 23

A polygon is _______ when no line that contains a side of the polygon contains a point on the interior of the polygon.

Answer 23

Convex

Question 24

A polygon that is not convex is ______.

Answer 24

Concave

Question 25

What is this? P = a + b + c

Answer 25

Triangle Perimeter Formula

Question 26

What is this? A = 1/2 bh

Answer 26

Triangle Area Formula

Question 27

What is this? P = 2l + 2w

Answer 27

Rectangle Perimeter Formula

Question 28

What is this? A = lw

Answer 28

Rectangle Area Formula

Question 29

An _______ is a set of points consisting of two different rays that have the same endpoint.

Answer 29

Angle

Question 30

An angle is a set of points consisting of two different rays that have the same endpoint, called the ______.

Answer 30

Vertex

Question 31

Rays of an angle are the angle's _______.

Answer 31

Sides

Question 32

Measures greater than 0° and less than 90°

Answer 32

Acute Angle

Question 33

Mesures 90°

Answer 33

Right Angle

Question 34

Measures greater than 90° and less that 180°

Answer 34

Obtuse Angle

Question 35

Measures 180°

Answer 35

Straight Angle

Question 36

Two positive angle whose measures have a sum of 90°

Answer 36

Complementary Angles

Question 37

Two positive angles whose measures have a sum of 180°

Answer 37

Supplementary Angles

Question 38

________ ______ are two angles that share a common vertex and side, but have no common interior points.

Answer 38

Adjacent Angles

Question 39

___________ ______ are two angles that do not share a common vertex and side.

Answer 39

Nonadjacent Angles

Question 40

Two adjacent angles are a ______ ____ when their noncommon sides are opposite rays. Are also supplementary angles.

Answer 40

Linear Pair

Question 41

Two angles are ________ ______ when their sides form two pairs of opposite rays.

Answer 41

Vertical Angles