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2011 – Named a Grammy Signature Gold School, [89] recognizing Allen as a U.S. public high school making an outstanding commitment to music education during an academic school year. 2011–2012 - Chorale Choir was invited to perform at the Texas Music Educators Association 's annual convention.
Allen High School. Allen Independent School District is a public school district based in Allen, Texas . Allen ISD covers most of the city of Allen, as well as portions of the cities of McKinney, Plano, and Parker. The district has a total enrollment of 21,634 [4] students, with an expected growth rate of 1–2% per year. [5]
Since no triangle can have two obtuse angles, γ is an acute angle and the solution γ = arcsin D is unique. If b < c, the angle γ may be acute: γ = arcsin D or obtuse: γ ′ = 180° − γ. The figure on right shows the point C, the side b and the angle γ as the first solution, and the point C ′, side b ′ and the angle γ ′ as the ...
In the following definitions, the hypotenuse is the side opposite to the 90-degree angle in a right triangle; it is the longest side of the triangle and one of the two sides adjacent to angle A. The adjacent leg is the other side that is adjacent to angle A. The opposite side is the side that is opposite to angle A.
Clock angle problems relate two different measurements: angles and time. The angle is typically measured in degrees from the mark of number 12 clockwise. The time is usually based on a 12-hour clock. A method to solve such problems is to consider the rate of change of the angle in degrees per minute.
A quadrilateral such as BCEF is called an adventitious quadrangle when the angles between its diagonals and sides are all rational angles, angles that give rational numbers when measured in degrees or other units for which the whole circle is a rational number. Numerous adventitious quadrangles beyond the one appearing in Langley's puzzle have ...
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