1. Polygons
A polygon is a closed figure made of line segments, or sides. Each line segment meets at its endpoint with the next line segment.
Basically, if the figure you see has straight sides that are all connected than it is a polygon.
A circle is NOT a polygon!

2. 2-Dimensional Shapes It’s all in the name
You can tell how many sides a polygon has by looking at the beginning part of the name of the shape:
For example,
Triangle: The beginning part of this word is TRI meaning 3 so a triangle has 3 sides.

3. Let’s Look At Some Others
Pentagon: PENT = 5 so a pentagon has 5 sides
Hexagon: HEX = 6 so a hexagon has 6 sides
Heptagon: HEPT = 7 so a heptagon has 7 sides
Octagon = OCT = 8 so an Octagon has 8 sides

4. Quadrilaterals
Squares and Rectangles are from a polygon group called QUADRILATERALS (QUAD means 4 so all quadrilaterals have 4 sides)
Parallelogram
Rhombus
Trapezoid
Square
Rectangle

5. Squares and Rectangles
A square has 4 sides that are EQUAL in length.
Every square IS a rectangle
All squares have four square corners
A rectangle has 4 sides in which the 2 opposite sides are equal in length.
A rectangle is a parallelogram with four square corners

6. Brainpop
Here is a fun and interesting brainpop to help us review what we learned:

7. PROBABILITY
Probability is the chance that something will happen - how likely it is that some event will happen.

8. In Terms of Probability
Impossible : the outcome has no chance of happening
Unlikely: The outcome has a very small chance of happening but most likely will not happen
Maybe: The outcome has an equal chance of happening or not happening
Likely: The outcome has a good chance of happening but may not happen
Certain: The outcome will happen.
Equally likely/unlikely: When comparing two outcomes the chances that both will happen or not happen is the same

9. Let’s Test Our Chances What are the chances that the following events will occur?
Unlikely Equally Likely Likely Maybe Certain Impossible
A dog will be born with 7 legs
Choosing a red apple out of a bag that has 2 red apples and 2 green apples
It will snow in December in Maine
The Penguins will go to the playoffs
The sun will set tonight
Rolling a 7 using one dice

10. Probability with Spinners
When finding the probability using a spinner, we use fractions to discuss the possibility of outcomes.
The spinner below is split into 4 equal parts so the is our denominator
Our numerator is the chances of the outcome to happen. For example, the probability of the spinner landing on a 3 is ¼. There is one section that has a 3 so 1 section out of 4 is our probability.

11. Let’s try some
Using the spinner what is the probability of landing on a 1,2, or 3?
What is the probability of landing on a a red?
3/4
2/4 OR 1/2

12. Some more practice
What is the probability of the spinner landing on blue?
In which spinner is the probability of landing on green 3/8?
2/5

13. BRAINPOP
Here is a Brainpop video to help us review what we just learned!