Perimeter/Area

Presentation

•

Mathematics

•

3rd Grade

•

Medium

•

CCSS

4.MD.A.3, 3.MD.D.8, 3.MD.C.6

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8 Slides • 15 Questions

Perimeter & Area

I can use addition and multiplication to solve problems involving perimeter and area.

Calculating Perimeter:

Perimeter= length+width+length+width
Perimeter = (side + side) x 2
Rectilinear Shapes-
- Count the square units that lay flat on the shape.
- Count the sides!

Multiple Choice

Which equation would you should use to find the perimeter?

7+5=12 cm

7+5+7+5=24 cm

7x5=35 cm²

7x5x7x5=1225 cm²

Multiple Choice

What is the perimeter of the shaded figure?

12 units

10 units

16 units

18 units

Multiple Choice

What is the perimeter of the rectangle? (Hint: top matches the bottom, left matches the right!)

48 feet

27 feet

28 feet

30 feet

Multiple Choice

What is the perimeter of the fence?

Some shapes are IRREGULAR!

Just add the sides

Multiple Choice

What is the perimeter of this shape?

24cm

8cm

35cm

17cm

Poll

How well do you understand perimeter?

I could teach it!

It's pretty easy!

I almost got it!

Calculating AREA:

Area is Units squared (units²)
Area=Length x Width (Rectangles)
Sum of all square units.
What other squared units could we use to measure an area?

Multiple Choice

So what is the area of figure?

8 square cm

16 square cm

15 square cm

15 cm

What if there are no numbers?

Multiple Choice

What is the area of the shape?

20 square units

21 square units

15 square units

12 square units

Does the area and perimeter need to be the same number?

Multiple Choice

What is the AREA and PERIMETER of the shape?

A=25 square units

P=24 units

A=20 square units

P=25 units

A=15 square units

P=24 units

A=22 square units

P=22 units

Multiple Choice

What is the area and perimeter of this rectangle?

P=21 units

A=18 square units

P=12 units

A=9 square units

P=3 units

A=3 square units

None of the above.

Multiple Choice

Find the area of the following figure?

32 square units

16 square units

15 square units

31 square units

9 square units

Multiple Choice

What is the area of the shape?

28 square m

29 square m

30 square m

11 square m

Multiple Choice

What is the area of the shape?

20 square feet

24 square feet

15 square feet

24 feet

Multiple Choice

Find the area of the following figure?

10 cm squared

14 cm squared

12 cm squared

8 cm squared

Poll

How are you feeling about AREA?

I could teach it!

Area is pretty easy.

I think I will have it with a little bit of practice

Help, I don't get it!

Perimeter & Area

I can use addition and multiplication to solve problems involving perimeter and area.

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Perimeter/Area

Perimeter & Area

Calculating Perimeter:

​Some shapes are IRREGULAR!

Just add the sides

Calculating AREA:

Perimeter & Area

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Some shapes are IRREGULAR!