Respuesta :

We have ∠C + ∠D = 180º, because C and D are supplementary.

Then, if ∠C = 116º, we have:

∠C + ∠D = 180º

116º + ∠D = 180º

In order to solve this equation, we can apply the same algebraic operations on both sides of the equation, until we isolate the variable ∠D, and find its value:

116º + ∠D = 180º

116º + ∠D - 116º = 180º - 116º

∠D = 64º

Therefore, option C is correct.

ACCESS MORE
EDU ACCESS