Linear Pairs
If one angle of a linear pair measures 102, the measure of other angle would have to be...
78
What is the one thing Mrs. Beach allowed you to add to the pink sheet?
Combine like terms
Vertical angles are always...
Equal or congruent
What is the if of the statement...
Hypothesis
Classify angle that measure 90.1
Obtuse
When is the sum of a linear pair not equal to 180?
Never
When something is equal to itself, we think of this property...
Reflexive
Two angles are vertical. One is 100, the other is 4b. What is b?
25
Which conditional statement negates the statement.
iNverse
A straight angle measures...
180
Two angles form a linear pair... one angle is 5 times larger than the other. What are their measures?
30 and 150
There are two postulates on the pink sheet... name them.
Angle addition postulate and segment addition postulate
What could cause a vertical angle in the real world...
examples
When you see a statement that has if and only if, what vocab term are you thinking?
Biconditional
examples
Draw two intersecting lines on the board. Give a real value to one of the angles and show the class how and why you know the other 3 angles.
Diagram on board
81=9x and 9x =81
What property is this?
Symmetric property
Could a 90 degree angle be vertical as well with intersecting lines. Yes, no, maybe so.
Yes
How would you describe the contrapositive?
Flip it and negate it.
Two complementary angles measure 40 and 25Y. What is the value of.
2
Two angles form a linear pair. The measure of the obtuse angle is 9 times the smaller angle. Give the measure of both angles.
18 and 162
This theorem is often used with isosceles triangles.
Base angle theorem
A pair of vertical angles measure 9b and 9c. What do you know about the variables and how?
=
If you study for the test, then you will get a good grade! What is the contrapositive of this statement. Is it true?
If you do not get a good grade, then you did not study for the test.
A left angle is the opposite but same as a right angle. The measure could be similar but also nonexistent or even equal is you think too hard. What is the measurement of a LEFT angle.
Haha