Unit 1 Review

Unit 1 Review Lesson

Geometry Basics

Points, Lines, and Planes

• Points are named using 1 letter.

• Lines are named using 2 letters, or points, on that line.

• Planes are named using 3 noncollinear points.

At what point is line BX intersecting Plane S?

Multiple Choice

Select your answer to the previous slide:

• U

• H

• B

• X

Did you select point B?

A line shows that it intersects a plane by being solid until it touches the plane. Once it goes through the plane, it will be a dashed or dotted line.

Select another name for line BH.

Multiple Choice

Select your answer to the previous slide:

• $\overline{BX}$

• 
  

  $\overline{UH}$
  

• $\overline{EX}$

Did you select line UH?

This line could also be named line HU, line BU, and line UB.

Select another name for Plane S.

Multiple Choice

Select your answer to the previous slide:

• Plane UBH

• Plane EUH

• Plane EXH

Did you select plane EUH?

A plane must be named by three NON-COLLINEAR points that lie within the plane.

Segment Addition Postulate

• Part+Part=Whole

• Bisector: Segments are congruent

Multiple Choice

Let E be between D and F. If DE=7 and EF=12, what is DF?

• 24

• -5

• 5

• 19

Multiple Choice

Let E be between D and F. If DE=7 and DF=12, what is EF?

• 24

• -5

• 5

• 19

Multiple Choice

Let E be between D and F. If DE=2x+7, EF=4x+5, and DF=4x+20, solve for x.

• 8

• 9

• 4

Multiple Choice

Let E be the midpoint of D and F. If DE=2x+7 and EF=4x+5, solve for x.

• 9

• 1

• 4

Distance Formula

• Step 1: Label Your Points

• Step 2: Plug in your Points

• Step 3: Solve!

Multiple Choice

Find the distance between (-12, 1) and (12, -1).

• 24.05

• 24.07

• 24.08

Multiple Choice

Find the distance between (-5, -8) and (-1, -16).

• 8.9

• 9.8

• 10.3

Midpoint Formula

• Step 1: Label your Points

• Step 2: Plug in your Points

• Step 3: Solve!

Multiple Choice

Find the midpoint of the segment with the endpoints:(1, 7) and (9, 0)

• (4, 3.5)

• (3.5, 5)

• (5, 3.5)

• (3.5, 4.5)

Multiple Choice

Find the midpoint of the segment with the endpoints:(4, 12) and (-6, 14)

• (-1, 13)

• (13, 1)

• (13, -1)

• (5, 13)

Naming Angles

• Use three letters (unless you are dealing with a single angle)

• Vertex must be the middle letter

Multiple Choice

Select the option that shows angle ABD:

Multiple Choice

Select the option that shows angle ABC:

Multiple Choice

Select the option that shows angle DBA:

Multiple Choice

Select the option that shows angle CBE:

Angle Classification

• Obtuse: >90

• Acute: <90

• Right: 90, perpendicular lines make this angle

• Straight: 180

Multiple Choice

Select the obtuse angle:

Multiple Choice

Select the image that contains a right angle:

Angle Addition Postulate

• Part+Part=Whole

• Remember Segment Addition

Solve for x.

Multiple Choice

Select your answer:

• 18

• 17

• 19

• 20

Angle Pairs

• Vertical: Across and Equal

• Supplementary: Add to be 180

• Complementary: Add to be 90

• Linear Pair: Adjacent angles that add to be 180

• Adjacent: Angles that are side by side

Solve for x.

Multiple Choice

Select your answer.

• 15

• 19

• 20

• 17

Finished!

You will have a test on Monday so don't forget, this is your study guide!