1.3 what is a widget
DESCRIPTION
TRANSCRIPT
Warm-Up
pg. 53 # 26, 27, 31 (Hint: start by drawing a figure, then label, then solve
#26
A BCD
3AB = 12 cm
#27
A
B
C
D
E
24
m<EBC = 36
1.3 What's a Widget?
1.3 What is a Widget? pg. 47 to 5 4
----Do NOT get hung up on the name.
A widget is a madeup word to illustrate a concept---
it is just a definition based on what you see in front of you and it is TRUE all the time....
AND there are no counterexamples to it
Creating a Good definition:
Classify Differentiate
Test (if you can find a conterexample then you need to
redefine the word)
Define these:
1. Parallel Lines2. Perpendicular lines3. Skew lines
Parallel Lines:
Lines in the same plane that never meet
Symbol to show lines are parallel
Arrow marks say these lines are parallelLines can ALSO be named by ONE lowercase cursive letter.
Statement describing the figure:
Perpendicular Lines:
Lines that intersect (cross) at exactly 90 angles
Symbol for perpendicular lines
Box indicates 90 (always in corner at vertex)
Statement for perpendicular Lines:
Complete Investigation
Defining Angles pg. 49 IN GROUPS
The best way to understand is to try YOURSELF, then TRY AGAIN.
You will learn more and REMEMBER more if you figure it out yourself
You won't realize this now--but TRUST ME-or ask a Junior
Right Angle:
Acute Angle
Obtuse Angle
Pair of Complementary Angles Pair of Supplementary Angles
Pair of Linear AnglesPair Of Vertical Angles
Solve this problem!
Try page 51 to 52 # 1-21 odd