Hi Grade 7s!

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At any time, you and your parents can access class notes and important information from class. Feel free to post positive comments about the material and ask questions about lessons. Daily homework and important dates for assignments and tests will still be posted on Homework Hero. Enjoy!

Mrs. Scherger

Friday, 3 February 2012

4.3 Area of a Parallelogram

Focus: Develop a formula to find area of a parallelogram

Area
The amount of surface, measured in square units

Parallelogram
A polygon (quadrilateral-4 sides) with 2 sets of parallel lines


Activity - Handout Required!
Count the squares to determine the area of each parallelogram

Record your answers inside each shape

Cut shapes 3 and 4 to make them into squares or rectangles

Can you come up with a formula that will work for all parallelograms???

A=bh

Any side of the parallelogram can be the base, but the height must intersect the base at a 90ο angle


Arrowheads are used to indicate parallel lines



Practice - Page 141
#1c, 2, 5, 6, 8 & 9

1 comment:

  1. Wow!what a nice explanation about parallelogram and I am here to discuss some properties of parallelogram a parallelogram has four sides the opposite sides are parallel and equal,The point where two adjacent sides meet is called Vertex a parallelogram has four vertices a parallelogram has four angles and the diagonals of a parallelogram bisect each other.
    Find the Area of the Parallelogram Pictured below

    ReplyDelete