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Rectangle. In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°); or a parallelogram containing a right angle. A rectangle with four sides of equal length is a square.
CodeHS was selected as one of three education technology companies to take part in the 2013 Innovation Challenge, part of the NBC Education Nation initiative. [6] Innovation Nation challenge participants CodeHS, Teachley, and GigaBryte participated in a series of challenges in October 2013, culminating in a live pitch contest broadcast live on NBC during the Education Nation Summit.
Quizlet is a multi-national American company that provides tools for studying and learning. [ 1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2] and released to the public in January 2007. [ 3] Quizlet's primary products include digital flash cards, matching games, practice electronic ...
The Ailles rectangle. The Ailles rectangle is a rectangle constructed from four right-angled triangles which is commonly used in geometry classes to find the values of trigonometric functions of 15° and 75°. [1] It is named after Douglas S. Ailles who was a high school teacher at Kipling Collegiate Institute in Toronto.
"Saturday Night Live" weekend update host Colin Jost has abruptly left his post as Olympics correspondent after sustaining a foot injury.
Powers stresses this, though: Struggling with word finding and speaking more slowly doesn’t mean you have dementia. “But in some people, it can be the first sign of dementia,” he says ...
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The rectangle has dimensions of approximately 555 km by 370 km (3000 to 2000 stadia – plain of Atlantis [32]). The circle is around Snake Island (potential candidate for the capital of Atlantis [33]), located 35 km east of the Danube Delta. German researchers Siegfried and Christian Schoppe locate Atlantis in the Black Sea. Before 5500 BC, a ...