Which of these are properties of parallelograms? a
c
Diagonals are supplementary.
Opposite angles are congruent.
Diagonals bisect each other.
Diagonals are not congruent.
Opposite sides are supplementary,
Consecutive angles are supplementary.
Consecutive angles are congruent.
Opposite sides are congruent.

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x

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step-by-step explanation:

nndncnd cnn

snddnd

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: