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Word of the Week

Complementary Angles

posted Apr 2, 2013, 5:47 AM by Justin Kangas

Two or more angles that add up to 90˚. These angles do not need to be adjacent (next to each other).

Supplementary Angles

posted Apr 1, 2013, 6:25 AM by Justin Kangas

Two or more angles that add up to exactly 180˚. These two angles DO NOT need to be connected. It is ANY two angles that add up to 180˚. 

Characteristics of Quadrilaterals

posted Mar 5, 2013, 4:27 AM by Justin Kangas   [ updated Mar 5, 2013, 4:28 AM ]

    See the image. 

Perimeter

posted Feb 26, 2013, 5:39 AM by Justin Kangas   [ updated Apr 4, 2014, 11:03 AM ]

   The total distance around a polygon. To find perimeter you add up all of the sides. 

   With the figure to the left, you would add up the four side of the rectangle to find perimeter. 

   3 + 7 + 3 + 7 = 20 

   So the perimeter would be 20. 

Coefficient

posted Feb 14, 2013, 6:11 AM by Justin Kangas   [ updated Feb 14, 2013, 6:11 AM ]

The coefficient in Algebra is always the number in front of/attached to the variable. In the picture to the left, the coefficient is the 5. 

In scientific notation, the coefficient is the decimal that comes before the power of 10. For example, in 2.3 x 105 the coefficient is 2.3.

Square Root

posted Feb 14, 2013, 4:56 AM by Justin Kangas

  A number that produces a specified quantity when multiplied by itself. 

  For example, 7 is a square root of 49 because 7 • 7 is 49.

Skew

posted Feb 12, 2013, 11:45 AM by Justin Kangas   [ updated Feb 12, 2013, 11:47 AM ]

Two or more lines that are not parallel and will never intersect. In the image below, lines AB and CD are skew. 

Function

posted Feb 12, 2013, 11:41 AM by Justin Kangas

A FUNCTION is a special relationship between X and Y. This relation is expressed in a linear or non-linear equation like the one in the picture to the left. If you look at the picture, the relationship between X and Y is clearly stated if you read the equation. It says that: 

y = 2x + 3

Y is always 2 times the size of X plus 3


One of the properties of any function is that for every number X, there should only be ONE answer for Y. For example, in the problem to the left, they plugged 4 into the equation for X. So they did the following:

                                                                    Y = 2(4) + 3
                                                                    Y = 8 + 3
                                                                                                                             Y = 11

                                                          So when we plugged in 4 for X, we got 11. If this is a function, it will always be true. You will never plug in 4 for X and                           
                                                          get a different answer. It wouldn't makes sense. 2(4) + 3 should ALWAYS get you 11. 


                                                                         When looking at a table, or list of ordered pair, you can tell if you have a function. Just check the following:

                                                                         1) If there are no repeating X values, you have a function. 
                                                          2) If X does repeat, check to see if the Y values are the same or different. The same values imply that you                 
                                                              have a function. Different values imply there is no function because X was plugged into the equation twice and got                     
                                                              different answers. 



Ordered Pair

posted Feb 11, 2013, 9:24 AM by Justin Kangas   [ updated Feb 11, 2013, 9:40 AM ]

         




An X and Y coordinate paired together in a set of parentheses. These coordinates provide you with directions to a point on an coordinate plane. 

X-Coordinates move you left and right on the coordinate plane. A negative x-coordinate moves you to the left. A positive coordinate moves to the right

Y-Coordinates move you up and down on the coordinate plane. A negative y-coordinate moves you down and a positive y-coordinate moves you up

Equal

posted Feb 5, 2013, 10:35 AM by Justin Kangas   [ updated Feb 5, 2013, 10:40 AM ]

Two ways of saying the same thing. It is like Mr. Kangas = Justin Kangas. What happens to one, has to happen to the other because they are the same thing. If you give Mr. Kangas 5 dollars, you have also given Justin Kangas 5 dollars because Mr. Kangas = Justin Kangas. Or in other words, Mr. Kangas IS Justin Kangas. 



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