# Review sheet

• Sep 28th 2007, 08:56 PM
Nightfire
Review sheet
We're doing a review sheet on stuff we learned in like, the first month of school two years ago, so ive forgotten most of it. heres what i forgot:
What are three of the four ways to name this angle? (Not stuff like Acute or Obtuse)
Two angles are supplementary if the sum of their angles is..90 degrees, is that right?
what are vertical, adjacent, corresponding, alternate interior, and alternate exterior angles?
What is the associative property of addition? (i really dislike not knowing this one....)
and finally, Graph on a number line x (< or =) -3
• Sep 29th 2007, 03:23 AM
topsquark
Quote:

Originally Posted by Nightfire
Two angles are supplementary if the sum of their angles is..90 degrees, is that right?

No. Two angles are complimentary if their sum is 90 degrees. They are supplementary if their sum is 180 degrees.

Quote:

Originally Posted by Nightfire
What is the associative property of addition?

$(a + b) + c = a + (b + c)$

-Dan
• Sep 29th 2007, 03:36 AM
topsquark
Quote:

Originally Posted by Nightfire
what are vertical, adjacent, corresponding, alternate interior, and alternate exterior angles?

In the following attachment, the two horizontal lines are parallel.
1 and 3 are vertical angles. So are (2 and 4), (5 an 7), and (6 and 8). (Pairs of vertical angles are equal.)

1 and 2 are adjacent angles. So are (2 and 3), (3 and 4), (4 and 1), (5 and 6), (6 and 7), (7 and 8), and (8 and 6). (All of these pairs of angles also happen to be supplementary. This is not required.)

1 and 5 are corresponding angles. So are (2 and 6), (3 and 7), and (4 and 8). (Pairs of corresponding angles are equal.)

(2 and 8) and (3 and 5) are alternate interior angles. (Pairs of alternate interior angles are equal.)

(1 and 7) and (4 and 6) are alternate exterior angles. (Pairs of alternate exterior angles are equal.)

-Dan
• Sep 29th 2007, 04:29 AM
Nightfire
wow, thanks, i was off by a ton :eek: i'll have to study up on those
• Sep 29th 2007, 04:43 AM
earboth
Quote:

Originally Posted by Nightfire
...
and finally, Graph on a number line x (< or =) -3

Hello,

I've attached the graph of this inequality.

The filled dot indicates that the number -3 belongs to the graph. (Otherweise I would have used a small circle = hollow or empty dot).
• Sep 29th 2007, 08:49 AM
Nightfire
oh yeah, thanks. i had forgotten when to fill the circle and when not to and where the circle went :p