Area Formulas

Rectangle

What is the area formula?

Rectangle What is the area formula?bh BASE X HEIGHT

Rectangle What is the area formula?bh What other shape has 4 right angles?

Rectangle What is the area formula?bh What other shape has 4 right angles? Square!

Rectangle What is the area formula?bh What other shape has 4 right angles? Square! Can we use the same area formula?

Rectangle What is the area formula?bh What other shape has 4 right angles? Square! Can we use the same area formula? Yes

Practice! Rectangle Square 10m 17m 14cm

Answers Rectangle Square 10m 17m 14cm 196 cm m 2

So then what happens if we cut a rectangle in half? What shape is made?

Triangle So then what happens if we cut a rectangle in half? What shape is made?

Triangle So then what happens if we cut a rectangle in half? What shape is made? 2 Triangles

Triangle So then what happens if we cut a rectangle in half? What shape is made? 2 Triangles So then what happens to the formula?

Triangle So then what happens if we cut a rectangle in half? What shape is made? 2 Triangles So then what happens to the formula?

Triangle So then what happens if we cut a rectangle in half? What shape is made? 2 Triangles So then what happens to the formula? bh

Triangle So then what happens if we cut a rectangle in half? What shape is made? 2 Triangles So then what happens to the formula? bh 2

Practice! Triangle 5 ft 14 ft

Answers 35 ft 2 Triangle 5 ft 14 ft

Summary so far... bh

Summary so far... bh

Summary so far... bh

Summary so far... bh

Summary so far... bh 2

Parallelogram Let’s look at a parallelogram.

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

Parallelogram Let’s look at a parallelogram. What happens if we slice off the slanted parts on the ends?

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?

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

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

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

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

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

Practice! Parallelogram Rhombus 3 in 9 in 4 cm 2.7 cm

Answers 10.8 cm 2 27 in 2 Parallelogram Rhombus 3 in 9 in 4 cm 2.7 cm