Across
1
System of ordered marks for measuring
4
Symbol representing unknown value
5
Split into equal parts
6
Number divisible only by 1 and itself
7
Part of a line with two endpoints
10
U-shaped curve of a quadratic function
Down
1
Collection of distinct elements
2
Longest side of a right triangle
3
Space between two intersecting lines
8
Rectangular array of numbers
9
Distance from center to edge of circle
11
Closed shape with straight sides