addition
what is 2+2
4
what is 2-1
1
what is 5x2
10
what is 2/1
2
what is a right angle
90
what is 12+8
20
what is 42-12
30
what is 24x10
240
what is 7/2
3.5
what is a straight angle
180
what is 20+76
96
what is 31-21
10
what is 2x4x2
16
what is 200/100
2
what is 90x4
360
what is 29+67
96
what is 21-9
12
what is 42x2
84
what is 23/10
2.3
what is a ray
a direction that goes on forever
what is 56+10
66
what is 50-12
38
what is 4x90
360
what is 100/10
10
what angle has 2 rows and columns
perpendicular lines or angles