Finding Area and Perimeter of Polygons

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Presentation transcript:

Finding Area and Perimeter of Polygons

Area Definition: The number of square units needed to cover a surface. (INSIDE) Length x width

Perimeter Definition: The sum of the length of all the sides of a polygon.

Base Definition: A side or face of a figure on which the figure stands.

Height Definition: The distance from the bottom to the top of a figure.

Width Definition: How wide a figure is from side to side.

Length Definition: The measure of the distance across an figure.

How to find Area.

Square 5cm

Rectangle 32 mm 2 cm

Triangle 10m 4m

Parallelogram 40cm 30cm

Rhombus D=5cm d=4cm Area= 𝐷𝑥𝑑 2 Example: 5𝑥4 2 20 2 10 𝑐𝑚 2

b=3m B=5m Area= 𝐵+𝑏 𝑋ℎ 2 Example: 5+3 4 2 8 4 2 32 2 16 𝑚 2 H=4m Trapezoid b=3m B=5m Area= 𝐵+𝑏 𝑋ℎ 2 Example: 5+3 4 2 8 4 2 32 2 16 𝑚 2 H=4m

The perimeter of a rectangle is 36cm and it length is 10cm. Tricky problems The perimeter of a rectangle is 36cm and it length is 10cm. Find the area of the rectangle in square millimeters.