Category Archive: algebra

Apr 27

Conic Sections on Desmos

Categories:

algebra, Algebraic Thinking, functions, geometry

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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

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Mar 23

Spotting Numbers and Visual Patterns

Categories:

algebra, geometric patterns, geometry, mathematical reasoning, patterns, Problem Solving, sequences

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Here a two great websites that provide lots of great pattern problems. [this website hasn’t been functional lately – too bad! – Spotting Numbers – interactive, does require Java.] Visual Patterns – less interactive, (no Java needed). These patterns can be used with elementary students (if you just ask number questions) through advanced algebra (if …

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