Area Formulas

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What happens if we slice off the slanted parts on the ends?

Slide 33

Parallelogram

Let’s look at a parallelogram.

What happens if we slice off the slanted parts on the ends?

Slide 34

Parallelogram

Let’s look at a parallelogram.

What happens if we slice off the slanted parts on the ends?

Slide 35

Parallelogram

Let’s look at a parallelogram.

What happens if we slice off the slanted parts on the ends?

Slide 36

Parallelogram

Let’s look at a parallelogram.

What happens if we slice off the slanted parts on the ends?

What will the area formula be now that it is a rectangle?

Slide 37

Parallelogram

Let’s look at a parallelogram.

What happens if we slice off the slanted parts on the ends?

What will the area formula be now that it is a rectangle?

bh

Slide 38

Parallelogram

Be careful though! The height has to be perpendicular from the base, just like the side of a rectangle!

bh

Slide 39

Parallelogram

Be careful though! The height has to be perpendicular from the base, just like the side of a rectangle!

bh

Slide 40

Parallelogram

Be careful though! The height has to be perpendicular from the base, just like the side of a rectangle!

bh

Slide 41

Rhombus

The rhombus is just a parallelogram with all equal sides! So it also has bh for an area formula.

bh

Slide 42

Practice!

Parallelogram

Rhombus

3 in

9 in

4 cm

2.7 cm

Slide 43

Answers

10.8 cm2

27 in2

Parallelogram

Rhombus

3 in

9 in

4 cm

2.7 cm

Slide 44

Let’s try something new with the parallelogram.

Slide 45

Let’s try something new with the parallelogram.

Earlier, you saw that you could use two trapezoids to make a parallelogram.