+ Introduction to Shapes Squares and Rectangles. + Do Now: Chalk Talk.
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+ Introduction to Shapes Squares and Rectangles
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Transcript of + Introduction to Shapes Squares and Rectangles. + Do Now: Chalk Talk.
+
Introduction to ShapesSquares and Rectangles
+Do Now:
Chalk Talk
+Polygon
A polygon is regular when all angles are equal and all sides are equal
Example: square, equilateral triangle, pentagon, hexagon, heptagon, octagon
+Quadrilateral
A flat shape with four straight sides
Examples: Squares, Rectangles, Rhombus, Trapezoid, Parallelogram
+Square A 4-sided flat shape with straight sides where:
• all sides have equal length, and• every interior angle is a right angle (90°)
It is a Quadrilateral and a Regular Polygon
+Perimeter
The distance around a two-dimensional shape.
Perimeter
Example: the perimeter of this rectangle is 3+7+3+7 = 20
+Perimeter of a Square
P=S+S+S+S or P=4s
Perimeter is measured in units
+Find the Perimeter
+Rectangle
A 4-sided flat shape with straight sides where all interior angles are right angles (90°).
Also opposite sides are parallel and of equal length.
+Perimeter of a Rectangle
P=S+S+S+S or P= 2(Length)+2(Width)
Perimeter is measured in units
+Find the Perimeter
+Practice
Work on the following hand out!
+Area
The size of a surface.
The amount of space inside the boundary of a flat (2-dimensional) object
+Area of a Square and Rectangles
A= Length x Width
Units squared
+What is the Area?
+Practice!
Work on the following hand-out!
+Before You Go!
Define Area
Define Perimeter
Draw a Square or Rectangle and find the perimeter and area of your shape
