Bellringer!

• Solve the following equations1. P – 1 = 5P + 3P – 82. -8 = -(y + 4)3. (2 + 6 x 2 + 2 – 4) x 2 = ?4. (5 + 16) ÷ 7 – 2 = ?

Chapter 1 Vocab and overview

What do you think?• Distance

• Point

• Line

• Plane

• Segment

• Ray

• Midpoint

• Bisector

• Vertex

• Angle

• Perpendicular

• Congruent

Definitions

• Point- indicates location has no size • Line- straight path that goes on and on

forever in both directions. • Plane- flat surface with no end and no

thickness• Segment- part of a line with two end points• Ray- part of a line with one end point that

never ends on the other side

Vocabulary

• Coordinate• Distance• Congruent segments- segments of exactly

the same length• Midpoint- point in the middle of a segment• Segment bisector- point, line, ray, or segment

dividing a segment into two even pieces.

Lets see

1. Name a point in the figure.2. Give two names for a line in the figure.3. Give two names for the plane in the figure.

Bell Ringer Page 2 top 4 lines

Intersection- set of all points two figures (lines, planes, shapes) share

Intersection- set of all points two figures (lines, planes, shapes) share

WE DO• Name a

1. Point

2. Line

3. Plane

4. Ray

5. Segment

6. Intersection

Segment Addition Postulate

• If A B and C are colinear then AB + BC = AC

Lets Try it

WE DO!!1. If AD = 12 and AC = 4y

– 36, Find the value of y. Then find AC and DC

2. IF ED = a + 4 and DB = 3a – 8, find ED, DB, and EB.

Vocabulary• Angle

• Side• Vertex

• Acute

• Right

• Obtuse

• Straight

Parts of an Angle

Types of Angles