10 + (-5) = 10 - 5 = 5
-11 + 20 = 20 + (-11) = 20 - 11 = 9
102 + (-1) = 102 - 1 = 101
-20 + 60 = 60 + (-20) = 60 - 20 = 40
Answer: It's correct because it is the only one with an angle more than 180°
Step-by-step explanation:
D is a right angle, A is an acute angle, as well as B. So not only is C the only one with an obtuse angle and it also has the biggest angle out of the other two angles on the triangle, you can use process of elimination to figure it out as well. Hope this helps, have a good day! :-)
Answer:
B
Step-by-step explanation:
