The four angles of a quadrilateral add up to 360°. (You can see this easily in a rectangle, which simply contains 4 angles that are each 90°.)
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Al angles greater than 0 but less than 90 degrees are acute angles.
re-al-it-y has four syllables.It has 4re-al-it-y
There are four syllables. Al-to-geth-er.
Four. un-u-su-al
Four: un-u-su-al