addition
what is 300 + 49 + 50?
399...
67- 39
26
How many sides does a decagon have?
10...
450 + 69 + 10
529...
89-76
13...
how many sides does two triangles have all together?
6...
399 + 83 + 10
392...
794-381
413...
what angle is greater than ninety degrees?
obtuse angle...
688 + 263?
951...
6,999-786
6,213...
how much degrees is a right angle?
90 degrees...
798 + 781 +390?
1,879
798-481
317...
what is a 180 degree angle called?
Straight angle...