Across
1
Three-sided polygon
5
Line segment connecting two circle points
7
Distance from center to edge of circle
8
Result of raising a number to an exponent
10
Number with digits after a point
12
System of ordered marks for measuring
Down
2
Total distance around a shape
3
Number greater than zero
4
Line crossing from corner to corner
6
Steepness of a line
9
Repeated addition
11
Mathematical rule or equation
13
Closed shape with straight sides