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Hints and Tips:

Prove that `∆ABC` is similar to `∆DEF` by showing that the corresponding sides are proportional. Use the calculator at the top of the screen to calculate the ratios of all three corresponding sides. Round off to the hundredths place. Then explain why these ratios prove that the triangles are similar.

Glitches:

Plot four lines to connect the points in adjacent quadrants. One is done for you.

For the two points given below find the slope and y-intercept of the line and then write the equation of the line. $$ (0,3) and $$ (−14,11) Press the button to check your work.

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Q: How to get the best score?

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Q: What is your strategy?

Desmos Scientific Calculator Gameplay, Trailers and Related Videos

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Watch Desmos Graphing Utility Lesson video.

Watch An Introduction to the Desmos Graphing Calculator video.

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Watch Learn Desmos: Summation video.

Watch Learn Desmos: Parametric Equations video.

About the application:

Move beyond arithmetic with the Desmos scientific calculator! In addition to the primary operations, take advantage of a dozens of built-in functions for exploring trigonometry, stats, combinatorics, and more. Or, define and evaluate your own functions -- all for free. At Desmos, we imagine a globe of universal math literacy where math is available and enjoyable for all students. To that end, we’ve built a easy yet strong scientific calculator that runs on the same blazingly quick math engine as our next-generation graphing calculator, but with a more streamlined set of features, for those times when you just don’t need a graph. It’s intuitive, attractive, and completely free. Features: Arithmetic: In addition to the primary operations, the scientific calculator also supports exponentiation, radicals, absolute value, logarithms, rounding, and percentages. Trigonometry: Evaluate the fundamental trigonometric functions and their inverses, using either radians or degrees for angle measure. Statistics: Compute the mean and standard deviation (sample or population) of a list of data. Combinatorics: Count combinations and permutations and calculate factorials. Other features: - Works offline, no internet connection needed. - Make and evaluate your own functions using familiar function notation. - Assign values to variables for later use. - View multiple expressions at once. Unlike a lot of scientific calculators, all of your previous work remains visible on the screen. - The “ans” key always holds the value of your latest computation so that you never have to remember or copy a effect. If you change an earlier expression, the “ans” value updates automatically. - Did we mention it’s free? Learn more at www.desmos.com, and visit www.desmos.com/scientific to see the gratis, online ver of our scientific calculator.