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2020-2021 REPLAY

A. Bouchard

Term 3

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Snapshot of Topics

• Classify 2D Figures
• Perimeter and Area
• Volume
• Data Analysis

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1

Classify 2D Figures

Tips

Click on anything that moves!

try it!

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The roller skate icon links you to a GAME to play! 🎮

The camera icon give you notes or a SNAPSHOT of info 📷

The headphones icon will link to a music video on the topic 🎧🎵

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This is where you can check your answers. Make sure to solve first, don't spoil it!

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Classify 2D Figures

Two-dimensional figures have length and width

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Game On!

Identify Shapes

Classify Triangles

https://youtu.be/mLeNaZcy-hE

Triangle story

👔Mr. T (Triangle) wears a TIE but not a suit.

No congruent sides=SCALENE

Some congruent sides: either Isosceles or Equilateral

✨Triangles are a family of shapes. Think of your family. You may all have the same last name. Well, TRIANGLES all have the same last name, Triangle.

But they also have first and middle names.

Let's look at this example:

Its first name comes from its sides: Are any of the sides the same length?

Yes, there are 2 congruent sides, so this is an ISOCELES triangle.

Its middle name comes from its angles. What do you notice?

Well, if any of the angles are 90 degrees, then we have a right angle, so this is RIGHT triangle

Let's give this baby a name! 👶🏽

Isoceles Right Triangle

(first: sides) (middle: angles) (last: TRIANGLE)

First: (sides) No congruent=Scalene, At least 2 congruent=Isosceles, 3 congruent=Equilateral

Middle: (angles) Acute=all 3 acute angles(<90 ), Right=One 90 angle, Obtuse=One >90 angle

Last: (type of polygon) Count all the sides and give it a name

Meet..... Scalene Obtuse Triangle!

SIDES: None of the sides are congruent (otherwise you would see the hash marks)

ANGLES: One angle is Obtuse (110)

POLYGON: 3 sides = triangle

2

Perimeter and Area

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Perimeter

Perimeter measures the RIM of a figure.

Area

Area measures the space inside a 2D figure.

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When I say the word "rim" what does that mean?

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When I say the word perimeter, what does that mean?

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The rim of something in the outside edge of an object and the perimeter is the measure of the outside edge of a shape. The would rim is in the word perimeter, so the definition of the word, is in the word!

To find perimeter, you must ADD all sides together.

⭐Borders, fences, picture frames all are examples of perimeter.

What is AREA?

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✏Area is the amount of squares that fit inside a shape and is measured in square units like sq. feet or sq. inches.

To find area, you must MULTIPLY the length and the width of a figure.

⭐Tiles, carpet, walls are all examples of area.

Game On!

TWO TRUTHS AND A LIE

1. The perimeter of a rectangle is found by adding all sides.

2. You can find the area of a square if one side is given.
3. Perimeter and area of a square are always the same since the sides are all equal.

1. TRUTH! The perimeter of a rectangle is found by adding all sides.

2. TRUTH! You can find the area of a square if one side is given.
3. LIE!! Perimeter and area of a square are always the same since the sides are all equal. Think of a square with a side of 5, the area would be 5x5 or 25 square units. But the perimeter would be 5+5+5+5 or 20 units. NOT THE SAME!

CAN YOU SPOT THE LIE?

1. TRUTH! 45.01 > 45.009

2. LIE! 12.782 rounded to the nearest hundredth is 12.77

(12.782 ROUNDED TO THE NEAREST HUNDREDTH IS 12.78)

3. TRUTH! 34.2, 33.08, 33.013 are in order from greatest to least

34.2 <---greatest

33.08

33.013 <---least

3

Volume

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VOLUME

The space inside a 3D figure like a cube or rectangular prism

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Volume

✏Volume is the total space inside a 3D shape

🎲Another way of saying this is how many CUBES fit inside a 3D figure

We can find the VOLUME of:

🎲Cubes V=s x s x s

📦Rectangular Prisms V=l x w x h V=Bh

(B stands for the area of the base, or "Bottom" layer)

Whenever you solve for Perimeter, Area or Volume,

Always write the formula and then solve!

Game On!

Would you rather....

A. Have a pool that is 4 feet deep, 8 feet wide, and 12 feet long.

B. Have a pool that is 8 feet wide, 10 feet long, and 6 feet deep.

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A. Have a pool that is 8 feet deep, 12 feet wide, and 4 feet long.

Your pool would have a Volume of 8x12x4 or 384 cubic feet. It would be deep enough to dive, maybe! But it would look smaller in your yard.

B. Have a pool that is 10 feet wide, 8 feet long, and 6 feet deep. Your pool would have a Volume of 10x8x6 or 480 cubic feet. It would be bigger, but not as deep!

Volume game

Build using cubes

Which one sums up the steps of finding VOLUME the best?

A. Count the cubes in the bottom layer of a prism and multiply by 3

B. Multiply the length times the width of a cube

C. Multiply the length, width and height of a 3D figure

D. Count how many squares fit in a rectangle

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C. Multiply the length, width and height of a 3D figure.

A. If you are 10 years old, you would get \$554

If you are 11 years old, you would get \$609.40

B. \$85.41 x 7=\$597.87

So, if you want more money, choose wisely!!!

😁🧠

4

Data Analysis

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DATA ANALYSIS

Frequency Tables, Bar Graphs, Dot Plots, Stem and Leaf Plots, and Scatter Plots

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Bar Graphs

Bar Graph: A chart using rectangular bars or strips of color to help compare data.

Scale: The set of numbers used on a graph. The scale can count by 1's, 2's or another value.

A dot plot is a way to collect and show data.

A dot plot includes a number line and dots representing data. A key can show you what each dot represents.

= one student

A Stem and Leaf Plot organizes data by place value.

A Scatter Plot is a graph of points showing the relationship between two sets of data.

Game On!

Make a Dot Plot!

Ask 10-20 of your friends how many SIBLINGS (brothers/sisters) they have. List the data in a table:

How to Make Dot Plots

1. List the data in order from least to greatest.

2. Draw a number line: include all the numbers on your list.

3. Draw a dot to represent each data point. Don't forget to make a key!

(you should have as many dots as people you asked)

⭐Challenge: Analyze the data

• How many students have less than 2 siblings?
• What fraction of students have at least 3 siblings?
• Write your own question! 🥇

DOUBLE BAR GRAPHS

Replay Recap

PeRIMeter measures the RIM

Joke of the day

Why is the obtuse triangle always upset?

Because he is never right.

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💪Good mathematicians always find a TOTAL of the data and LABEL it

Great job!