Across
1
Three-sided polygon
4
System of ordered marks for measuring
5
Collection of distinct elements
6
Repeated addition
7
Round shape with all points equidistant
8
Mathematical rule or equation
10
Longest side of a right triangle
Down
1
Line touching circle at one point
2
Result of raising a number to an exponent
3
Space between two intersecting lines
4
Exact correspondence on both sides
5
Part of a line with two endpoints
6
Rectangular array of numbers
9
Power to which a number is raised
11
Proven mathematical statement