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What is 1 + 3?
mathematical statement that two expressions are equal
a statement that says two ratios are equal
comparison of parts to a whole
a proper fraction whose denominator is a power of 10
Comparing two quantities by division
Two figures that have the same shape, but not necessarily the same size; The sides of the corresponding sides are proportional or all the angles are equal.
the number by which a dividend is divided
the amount that can be contained; volume
the sum of two angles that equal 90 degrees
the sum of two angles that equal 180 degrees