Addition
20 + 30
50
75 - 25
50
7 x 4
28
18/3
6
A shape that has 4 straight sides all the same length.
Square
102 + 298
400
650 - 10
640
92 x 3
276
508/4
127
What angle is exactly 90 degrees?
Right Angle
290 + 230
520
873 - 482
391
504 x 9
4,536
9,570/2
4,785
An angle that measures more than 90 degrees, but less than 180 degrees.
Obtuse Angle
1,328 + 126
1,454
19,038 - 11,018
8,020
36 x 79
2,844
1,854/8
231 R6
Two lines that cross at a 90 degree angle.
Perpendicular Lines
1,487 + 2,439
3,926
100,000 - 86,932
13,068
8,637 x 6
51,822
2,424/12
A straight row of points that starts at one point, and ends at another; a part of a line.
Line Segment