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One of the measures of central tendency IS the average, also known as mean. You can't calculate the average from other measures of central tendency.
16 ounces equal 2 cups, also known as a pint. Also, 16 ounces equal a pound.
An equilateral triangle which has three sides of equal length also has three equal angles. Each angle measures 60° and is therefore an acute angle as it is less than 90° .
Having all the sides equal; as, an equilateral triangle; an equilateral polygon., A side exactly corresponding, or equal, to others; also, a figure of equal sides.
A regular 18-gon, also known as an octadecagon, has 18 sides. Each side is of equal length, and each internal angle measures 150 degrees. This polygon is part of the family of polygons that can be defined with any number of sides.