Geometry   Géométrie   Geometria - Accueil. Algebra :: Manipulating algebraic expressions/formulae. There are 67 results Broad Topics > Algebra > Manipulating algebraic expressions/formulae Your Number Was... Stage: 3 Challenge Level: Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know? Crossed Ends Crosses can be drawn on number grids of various sizes.
Matchless Stage: 3 and 4 Challenge Level: There is a particular value of x, and a value of y to go with it, which make all five expressions equal in value, can you find that x, y pair ? Nicely Similar Stage: 4 Challenge Level: If the hypotenuse (base) length is 100cm and if an extra line splits the base into 36cm and 64cm parts, what were the side lengths for the original right-angled triangle? Temperature Water freezes at 0°Celsius (32°Fahrenheit) and boils at 100°C (212°Fahrenheit). Sums of Pairs Jo has three numbers which she adds together in pairs. Partitioning Revisited Multiplication Square Salinon This shape comprises four semi-circles. Complex Partial Fractions. Encyclopedia of Mathematics.
Geogebra. Dana C. Ernst | Free and Open-Source Textbooks. Mathematics & Teaching Northern Arizona University Flagstaff, AZ Website 928.523.6852 Twitter Instagram Facebook Strava GitHub arXiv ResearchGate LinkedIn Mendeley Google Scholar Impact Story ORCID Current Courses MAT 226: Discrete Math MAT 320: Foundations MAT 431: Analysis About This Site This website was created using GitHub Pages and Jekyll together with Twitter Bootstrap. Unless stated otherwise, content on this site is licensed under a Creative Commons Attribution-Share Alike 4.0 International License. The views expressed on this site are my own and are not necessarily shared by my employer Northern Arizona University. The source code is on GitHub. Land Acknowledgement Flagstaff and NAU sit at the base of the San Francisco Peaks, on homelands sacred to Native Americans throughout the region.
The story of the Gömböc. September 2009 Play this movie to see the Gömböc wriggle. This article is also available as a podcast. A Gömböc is a strange thing. It looks like an egg with sharp edges, and when you put it down it starts wriggling and rolling around with an apparent will of its own. Until quite recently, no-one knew whether Gömböcs even existed. Even now, Gábor Domokos, one of their discoverers, reckons that in some sense they barely exists at all. So what are Gömböcs and what makes them special? Balancing act The defining feature of a Gömböc is the fact that it's got just two points of equilibrium: one is stable and the other is unstable. A Gömböc made from plexiglass. "It's a bit like putting a ball on a hilly landscape," says Domokos, "if you put the ball down at a generic point, it will always roll off in the same direction, down into the valley.
Doubtful existence An ellipse has two stable and two unstable points of equilibrium. A geometric stem cell "This is intuitively clear," says Domokos. Visual Patterns.