Mathematics Crossword Challenge 2021 (Event Puzzle)

1. _____ diagram, A diagram involving two or more overlapping circles that aids in organizing data.
4. A measure of space; the number of unit cubes needed to fill a three-dimensional shape.
9. Common Counting Numbers.
11. The distance around a circle. Its length is the product of the diameter of the circle and pi.
12. A term used to describe any shape with same equal length.
13. A polynomial equation with two terms usually joined by a plus or minus sign.
15. A term used when the counting numbers has an end, countable.
17. Two lines in a plane that never intersect.
18. ______ angle is an angle that is is greater than 0 degrees and less than 90 degrees.
20. A mathematical's figure who owes his standing as the most famous name in mathematics due to a theorem about right-angled triangle.

2. The number that have repeated multiplication of the term, shown as a superscript above that term.
3. Longest part of a right-angle triangle.
5. A math sentence using the equal sign to state that two expressions represent the same number.
6. A type of transformation that moves points or shapes by “flipping” them across a line or axis; a mirror image of the original set of points.
7. A segment with endpoints on the circle that passes through its center.
8. Islamic Mathematicans which introduced Hindu-Arabic numerals and algebra to European mathematicians(name with dash).
10. A three-dimensional figure with a circular base joined to a point called the apex.
14. ______ triangle with at least 2 side of same length.
16. ______ fraction is fraction which the numerator is greater than or equal to the denominator.
19. A segment whose endpoints are points on a circle.