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copyright©amberpasillas2010 •Remove all other thoughts from your mind. •Pay close attention. •Try all the examples. •Ignore all other distractions. copyright©amberpasillas2010 Polygon: Any straight-sided closed plane figure. copyright©amberpasillas2010 Polygons come in all shapes and sizes. copyright©amberpasillas2010 # of sides Name Picture 3 Triangle 4 Quadrilateral 5 Pentagon 6 Hexagon 8 Octagon 10 Decagon copyright©amberpasillas2010 Name The Quadrilateral 1) 2) trapezoid 3) rhombus 4) rectangle 5) parallelogram copyright©amberpasillas2010 square Name The Quadrilateral The sum of all the angles equals 360º degrees in a quadrilateral. 90º 90º 90º 90º copyright©amberpasillas2010 Today we are going to find the Area of the Polygons Rectangles & Squares. copyright©amberpasillas2010 Area is the number of square units that are needed to cover the surface of a figure. height (h) base (b) How many squares cover this rectangle? The area of this rectangle is 12 squares or 12 units squared. copyright©amberpasillas2010 Label the dimensions of this rectangle. 2 units 6 units 2 2 units x 6 units = 12 units . 2 Area is in units because you are multiplying units. copyright©amberpasillas2010 We found the area of the rectangle by multiplying the base times the height. 2 units A = bh 6 units The area of a rectangle is also known as the length times the width. A = bh is the same as A = lw copyright©amberpasillas2010 What is the area of the rectangle? 5 x 6 2 30 ft. 5 ft. 2 6 ft. 30 ft or square feet copyright©amberpasillas2010 PERIMETER: Is the distance around a figure. in + in + in + in = in AREA: Is the square units that cover a figure. length • width = in • in = in 2 squared width length VOLUME: The number of cubic units inside a figure. length • width • height 3 cubed in • in • in = in copyright©amberpasillas2010 height width length What is the area of the rectangle? 2 in. 5 in. 2 2 x 5 2 10 in. 10 in or square inches copyright©amberpasillas2010 A square is a special rectangle. Since the base and the height are the same size, we call them sides (s) instead of base and height. height = s A= s s s base = s copyright©amberpasillas2010 2 What is the area of the square? 4 x 4 2 16 m. 4 m. 4 m. 2 16 m or square meters copyright©amberpasillas2010 What is the area of the square? 5 x 5 2 25 in. 5 in. 5 in. 2 25 in or square inches copyright©amberpasillas2010 The End! Take out your study guide! copyright©amberpasillas2010 #1 The Area of a figure is the number of square units needed to cover it. 2 3 Rectangle A=2 3 6 square units 6 units2 Square 8m 4 8m 5 A l w A = s A 54 20 un 2 A 88 2 64 m 2 copyright©amberpasillas2010 #2 PERIMETER: Is the distance around a figure. in + in + in + in = in AREA: Is the square units that cover a figure. length • width = in • in = squared width 2 in length VOLUME: The number of cubic units inside a figure. length • width • height 3 cubed in • in • in = in copyright©amberpasillas2010 height width length