# Monthly Archive: April 2015

Apr 27

## Conic Sections on Desmos

Go to this Desmos graph https://www.desmos.com/calculator/tsfynm2to8 It shows two each of the four conic sections Circles, Ellipses, Hyperbolas, Parabolas Note: A hyperbola has two branches. Only one is shown in the image.  A cone actually has two frustums.  The image only shows one frustum.   http://www.intmath.com/plane-analytic-geometry/conic-sections-summary-interactive.php

Apr 20

## Why the Area of a Trapezoid is What it is

There are six ways to show that the area of a trapezoid is See the following PowerPoint file:TrapezoidArea6Ways

Apr 07

## Stacking Cups – Two Stacks

This is a 3-Act lesson. It involves systems of linear equations to model a physical situation.  (This could be thought of an extension of the cup-stacking activity that has been around for some time.  However, I think this lesson can be done without the original, one-stack lesson.) http://www.101qs.com/1897-stacking-cups–act-1#

Apr 01

## Study plan tips for studying for exams

http://faculty.wiu.edu/JR-Olsen/wiu/stu/m100/LEG-UP/studyplan.htm You can earn a LEG UP coupon for creating a study plan and study materials and showing them to Dr. Olsen (within a week after the exam). Exam II Exam III You can earn a LEG UP coupon for having your notebook organized and have it contain a typed cover page.