Across
- 4. Two angles are called _______ when their measures add up to 180 degrees.
- 5. Father of numbers.
- 7. A nine-sided polygon.
- 9. A _______ plane is a two-dimensional coordinate plane formed by the intersection of two perpendicular lines.
- 10. The difference between the highest and lowest values.
Down
- 1. (a+b)^2= a^2+2ab+b^2 is an ________.
- 2. ______ theorem: a^2+b^2=c^2
- 3. The sum of exterior angles of any _______ = 360*
- 6. Father of mathematics.
- 8. The middle value in a list ordered from smallest to largest.