PROBABILITY

Probability- likelihood or chance of an event occurring

We determine a probability by making a fractions

Favorable outcomes
-------------------------
Possible outcomes

Probability can be expressed within using fraction ,ratios ,or percent

EXAMPLE

1/2 or 1:2 or 50%

Possible outcome -One or more result of a probability experiment .

Favorable outcome-A successful result in a probability experiment .

HERE ARE EXAMPLES

I apologized if my picture is small cause i did it in paint

An example of a chart table

Independent event - the outcome of an event has no effect on the outcome of the other event .

Sample space -all possible outcome of an event

Tree diagram-A diagram use to organize outcome that contains a branch

example:

Students from 718 do the pages 54-55 at homework booklets





PROBABILITY here is a game

Fractions, Decimal, Percents

This is what we did today on thursday.

We did how to turn decimals into fractions and the other way, turn fractions into decimals.

eg.

Another thing about fractions and decimals is when there is a decimal with a hundredths place value the denominator will be 100

eg.
The last we did was how to use a ratio table but I forgot how to use it so I will be doing it on a calculator

65 * 120 = 7800 but the real percentage is 78%

Sorry I did it late I got a bit lazy

Fractions, Decimals, and Percents

Before you do anything with fractions, decimals, and percents you should know what they mean....


Fraction- out of any whole number








Decimal- out of 1





Percent- out of 100

Loading Strips

Loading Strips- used to answer questions like
50% of 20




Here is an example how to use a loading strip.....

50% of 20

That is one way how to find and answer besides using the loading srtip......USING A RATIO TABLE!!!!!!!!!!!!

A ratio table is like a loading strip but sideways.

__%_____I_____#__
I
I
I
I
I
I

Here is a way how to find 15 of 64 using ratio table.......

Sorry I couldn't a video about both raito tables and loading strips

ratio table with percents

the ratio table is basically the percent on one side and the whole number on the other side.
i know it is a little hard but if you look at it it is the same as what we did

look at this picture and and pretend129 is 100 and pretend that we divide it by 2 and we would get 50 and keep doing that!
on the other side lets pretend that100 is 20 we divide it by 2 and get 10 and you keep doing that until you make it easier for your self

Area of a triangle

Area of a triangle


A = 1/2 x b x h                20 x 12 = 240                   240 / 2 = 120 cm 2


OR

HALF OF 20 = 10 X 12 = 120 cm 2


BOTH WAYS GIVE YOU THE SAME ANSWER




HERE IS A LINK TO A WEBSITE THAT CAN HELP YOU OUT: http://www.mathsisfun.com/area.html

Chapter 03 review 14-15

What is the area of each parallelogram?
14)



Answer for a) :
Area= B x H
Area= 5 x 3
Area= 15 m2


15)









Answer to b) : Area of the rectangle is 2.7 times the area of the
parallelogram. The difference is the length of the
base, the height is the same.

Here is a video on how to find the area of a parallelogram.




Click on the link on how to find the area of a parallelogram.

Hope you enjoyed my blog! Don't forget to comment!

Chapter 03 Review 11 - 13

11. Draw the following angles.

Draw the angle bisectors using two different methods. Measure the two angles of each bisected angle. Record each set of angle measures.

Answer:

12. An architect measure the angle of a roof to be 132 degrees.

A) Predict the measures of the resulting angles if you bisect the angle.

B) Bisect the angle. Verify your predictions by measuring.

Answer:

A) 66 degrees.

B)

13. You construct an angle bisector of an 80 degree angle. You then construct an angle bisector of one of the resulting angles.

A) What is the measure of the smallest angle?

B) How does the measure of the smallest angle compare to the measure of the original angle?

Answer:

A) 20 degrees.

B) 1/4 of the original angle.

Thanks for reading. Sorry it took so late. And I'm sorry if this was not the one I was supposed to do, haha!