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.