Area: Parallelograms, Rectangles, Squares and Trapezoids.

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Presentation transcript:

Area: Parallelograms, Rectangles, Squares and Trapezoids

Trapezoid h h _ _

Area of a Trapezoid The two b’s are the two bases.

Parallelogram

Area of a Parallelogram Notice how the answer to Area problems is in square units. (cm.²)

Squares and Rectangles Since Squares and Rectangles are special types of Parallelograms you find the area the same way. Base times Height.

Triangle

Area of a Triangle

Find the area of the following parallelogram. The area of a parallelogram=a ´ b Area of parallelogram=8 ´ 13=104

Find the area of the following trapezium. The area of a trapezium= Area of trapezium=

Q & A What if your problem has two different units of measurement like feet and yards? To find area, perimeter, or volume you will need to have all the same units of measurment.

Area of a Circle

Find the Area of the circle.

You try this one.

What about the area of half of a circle? To find the area of half of a circle, first find the area of a whole circle. Then divide your answer by two.

What about the area of one- fourth of a circle? To find the area of one-fourth of a circle, first find the area of a whole circle. Then divide your answer by four.

Find the area of the square and subtract the area of the circle. How would you find the shaded area?