Perimeter and Area
Objectives:
Calculate the area of given geometric figures.
Calculate the perimeter of given geometric figures.
Use the Pythagorean theorem to find the lengths of a side of a right triangle.
Solve word problems involving perimeter, area, and/or right triangles.
Vocabulary:
polygon
perimeter
area
trapezoid
parallelogram
triangle
rectangle
circle
circumference
radius
diameter
legs (of a right triangle)
hypotenuse
Formulas:
Area of a triangle:
Area of a rectangle:
Area of a parallelogram:
Area of a trapezoid:
Heron’s Formula:
Pythagorean Theorem:
Circumference of a circle:
Area of a circle:
Possible Classroom Examples:
Find the perimeter of the figure below:
Find the area of each of the following polygons:
Find the length of the third side of the triangle below
Find the perimeter and area of the circle below.
Find the perimeter and area of the semicircle below.
Walk 100 yards south, then 120 west and then 30 yards south. How far from the original starting point are you?
© 2007 Elizabeth E. K. Jones and the ASU Department of Mathematics and Statistics - All rights reserved.