# Lesson: Area of Parallelograms

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### Lesson Objective

SWBAT find the area of parallelograms

### Lesson Plan

 Element/Time Lesson Steps Do Now (8:30 – 8:40)/(10:00 –10:10) ·         T displays 4 review problems ·         S complete problems independently on do now sheet ·         T walks around to check hw/help students with do now questions ·         T/S review problems together ·         S correct their work to reflect the correct answers HW Check ·         T displays correct answers and work ·         S correct work with colored pencil  T walks around to review specific students work ·         T/S review 3 questions Mental Math (8:40 – 8:50) /(10:10 – 10:20) ·         Law of Exponents Mini Lesson (8:50 – 9:25)/(10:20 – 10:55) ·         T will define area as the number of squares that fit within a shape – and thus all answers should be in sq. units o    Explain by relating to exponents – in this case we are multiplying two different dimensions together.  So it would be dimensions squared and this is why it’s called a two dimensional shape. ·         T/S will find area by placing squares into a rectangle and seeing how area is just the number of squares inside the shape and relating it to the formula. ·         T will demonstrate finding the area of a rectangle (noting that the formula is length x width) ·         S will find the area of a rectangle using formula ·         T will say that a rectangle is one type of parallelogram but also demonstrate that some parallelograms look like (a rhombus) ·         T will demonstrate finding the area of a parallelogram by o    Clearly identifying the base o    Clearly identifying the height §  Explain the height of the shape is going to be straight up and down – just like when you measure yourself, you don’t lean over and then measure you want to stand as straight as possible o    Display several different parallelograms to students in which the base, height and an additional leg’s measures are given.  Have students identify the base and the height in each example. ·         T will model finding the area of a parallelogram using the formula.  ·         T will demonstrate that the formula for a parallelogram and rectangle are the same by showing how a parallelogram and rectangle are similar (cut of the triangle on the end and move it to the other side to make it look like a rectangle and relate the height here). ·         S will find the area of a parallelogram using the formula ·         S will work on open-ended/mc questions to find the area of a given parallelogram · Skills Time (9:35- 9:50) /(11:05-11:25) ·         Skills Time: same groups as Monday o    Review matching equations

### Lesson Resources

 area parallelogram cw 3 17 09 1,483 Area of Parallelograms HW 1,020 U9.L7.SHAPES.Area.of.Parallelograms.docx 929