Attempt following question by selecting a choice to answer.
D
Three angles of a quadrilateral are
115o, 65o, and 94o. What is the measure of the fourth angle?
B DA.
D115
oB.
D68.5
oC.
D274
oD.
D86
o
D
D
Step 1: Sum of the four angle measures in a quadrilateral is 360o.
Step 2: Let x be the measure of the fourth angle.
Step 3: x + 115o + 65o + 94o = 360o
Step 4: x + 274o = 360o
Step 5: x = 360o - 274o[Subtract 274 from both sides.]
Step 6: x = 86o
Step 7: So, the measure of the fourth angle is 86o.