3.3+Finding+the+Area+of+a+Trapezoid+0910


 * How do I complete our wiki assignment?**

Type your text into a document first, keep tables, graphs and images as separate image files (screen-shots work best). If you are using another document (graph image, digital drawing) please don't make us download it to see it, upload the image to the page instead.

There are two purposes for the wiki. One, to give all students experience and practice using technology to display their ideas. Second, to assist those not present in class to give them a sense and concrete examples of what has happened in class on the day of the lesson. Keep these goals in mind as you check your work.Your page should include all of the following information, and anything else that you would like to improve the appearance of your page. Notes should summarize the class. Be sure to include the following:
 * Today's Date
 * Your Initials
 * Big Idea:
 * Essential Question:
 * Notes from Class:
 * Any new vocabulary and definition(s)
 * Any examples from the white board
 * Methods and strategies discussed in class
 * Your own questions
 * Problem set with **copied questions (in bold text)** and complete answers (in normal text), be sure to number your work. Show your work/thinking and include __at least one__ uploaded diagram or image.

G.A

__ **Say it With Symbols** __ Big Idea Equations can be used to model real things. ** Essential Question # 3 - ** ** What are the distributive and commutative properties useful for? ** __**INVESTIGATION 3 Problem 3.3 Finding the Area of a Trapezoid**__


 * A. Explain each of the student's method for finding the area.**

Tua's Method: Tua basically split the trapezoid into two different triangles. She found the area of each triangle (L+L=H) then added the area's together to get the area for the trapezoid. Sam's Method: Sam made the same exact trapezoid put put it next to it, to make a parallelogram. The he found the area of the Parallelogram (base x height) then divided by 2. Carlos's Method: Carlos


 * B. Write and algebraic expression to describe each method.**


 * C. Show that the expression you wrote in part B are equivalent.**

__**Follow Up**__


 * 1A. Natasha lost her drawing, but she had written this expression for finding the area of a trapezoid: 1/2//h////(b-a)+ha//**
 * Use this expression to decied what Natasha's drawing might have looked like. make a drawing and use it to help explain Natasha's method for finding the area.

B. Is Natasha's expression equivalent to the three expressions in part B? explain.** Yes this expression is equivalent.


 * 2. A trapezoid had a height of 10 centimeters and bases of 9 centimeters and 15 centimeters. Find the area of the Trapezoid using each of the four expressions.**