CK-12 Geometry Concepts

http://www.ck12.org Chapter 10. Perimeter and Area

56 = 4 h

14 =h

Example C

If the height of a parallelogram is 12mand the area is 60m^2 , how wide is the base?

Solve for the base inA=bh.

60 units= 12 b

5 units=b

Watch this video for help with the Examples above.

MEDIA

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CK-12 Foundation: Chapter10AreaofaParallelogramB

Vocabulary

Perimeteris the distance around a shape. The perimeter of any figure must have a unit of measurement attached to
it. If no specific units are given (feet, inches, centimeters, etc), write “units.”Areais the amount of space inside a
figure. Area is measured in square units. Aparallelogramis a quadrilateral whose opposite sides are parallel.

Guided Practice

Find the area of the following shapes.

3. A parallelogram with a base of 10 m and a height of 12 m.

Answers:

1. Area is 15( 6 ) = 90 un^2.


2. Area is 32( 12 ) = 672 un^2.


3. Area is 10( 12 ) = 120 m^2.

Practice

1. Find the area of a parallelogram with height of 20 m and base of 18 m.


2. Find the area of a parallelogram with height of 12 m and base of 15 m.