Across
1
Longest side of a right triangle
2
System of ordered marks for measuring
5
Mathematical rule or equation
9
Number divisible only by 1 and itself
10
Line touching circle at one point
Down
2
Part of a line with two endpoints
3
Result of multiplication
4
Amount of space an object occupies
6
Divisible by two
7
Steepness of a line
8
Part of a circle's circumference
11
Distance from center to edge of circle
12
Sum divided by count