Check out the continuation of the mathematical pearls.
Pearl of the rest
"The main function of the root is to bury itself."
"Angle is two lines that go and meet."
"Triangle are the triplets of the angle."
"Circumference is a flat wheel. For its manufacture we use the compass."
"Tangent is when the ball scrapes at the soccer game. It also has the name of goalpost."
"Empty set is one where musicians know nothing about music."
"A parallelepiped is an animal whose two feet are parallel."
"A concrete number is a number we see with the naked eye."
"Triangle is when two people like it, as we see in soap operas the so-called 'love triangle'."
"When it opens the angle is sine and when it closes it's cosine because it sticks to the sine."