Algebra Crossword Puzzle

This printable crossword puzzle on the topic of Algebra has 10 clues. Answers range from 5 to 18 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

What is a2 + b2 = c2 known as?
What is the longest side of a triangle called?
What is the formula for the area of a circle?
What is the opposite operation of division?
What is the formula for a triangle's area?
How many triangles with it take to make a pentagon?
What is the number that represents how many times that number should be used? (Ex. 2x)
What is the "letter" in an equation that has a missing value called?
What is the opposite operation of addition?
What is the rule that we used to find what you should calculate first in an equation?