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