Across
1
Part of a circle's circumference
3
Steepness of a line
4
Total distance around a shape
6
Divisible by two
7
Result of raising a number to an exponent
11
Round shape with all points equidistant
Down
2
Distance from center to edge of circle
3
System of ordered marks for measuring
4
U-shaped curve of a quadratic function
5
Symbol representing unknown value
7
Lines that never intersect
8
Difference between highest and lowest values
9
Repeated addition
10
Corner point of a polygon