7.G.2+-+Do+these+sides+or+angles+make+a+triangle?

Angles If the 3 angle measurements have a sum of 180 degrees then you can make a triangle. **Example:** 80, 20 , 80 = yes, because 80 + 20 + 80 = 180 40, 40 , 90 = no, because 40 + 40 + 90 = 170

Side Lengths If the sum of the two shorter sides are greater than the longest side then you can make a triangle. **Example:** 5, 7 , 10 = yes, because 5 + 7 = 12 and 12 is greater than 10 3, 7 , 15 = no, because 3 + 7 = 10 and 10 is less than 15 5, 8 , 2 = no, because 5 + 2 = 7 and 7 is less than 8 Video