Pre-Alg 7.2 Rays and Angles

Pre-Algebra

Lesson 7.2

Rays and Angles

SMOTDAngles

Rays

Angles

Whadda ya know 'bout...

Review: Points, Lines, Points of Intersection

Points:

A

B

C

D

E

Review: Points, Lines, Points of Intersection

Lines:

AC

CA

CD

DC

AD

DA

BC

CB

CE

EC

BE

EB

Review: Points, Lines, Points of IntersectionIntersection:

C

Learn: What is a ray?

Ray: Begins from an endpoint and extends forever in one direction

A B

Line: extends forever in both directions

A B

name:

name:

AB

BA

AB

Zayn, Harry, Louis, Liam, Niall

Angle: formed by two rays (sides) that share the same endpoint (vertex)

Degrees of Angles

Less than 90o 90o degrees Greater than 90o

angles

Acute Right Obtuse

http://www.youtube.com/watch?v=tqIki33mTgs

Name this:

APPLE

FRUIT

SPHERE

BREAKFAST

TOILET

PORCELAIN THRONE

THE LOO

OVAL OFFICE

"DROPPING KIDS OFF AT THE POOL"

MR. ZITELLO

TEACHER

MAN

IN MATH, ANGLES HAVE SEVERAL NAMES TOO

names:

Way #1: Using Points

names:

names:

Way #2: Using the vertex

names:

L

M

N

names:

Way #3: Use a number

names:

L

M

N

If 2 or more angles share a vertex, you have to use three letters OR a numerical to avoid confusion

Trick Question: Which angle is S ?

Trivia

Questions

Trivia

Questions

Trivia

Questions

Trivia

Questions

Trivia

Questions

http://www.mathplayground.com/alienangles.html