Answer:
C
Step-by-step explanation:
a straight line is 180, 180-40=140
Answer:
x = 10
Step-by-step explanation:
Consecutive angles in a parallelogram are supplementary, thus
∠ A + ∠ B = 180, substitute values
9x + 8 + 8x + 2 = 180, that is
17x + 10 = 180 ( subtract 10 from both sides )
17x = 170 ( divide both sides by 17 )
x = 10
She could measure the next length to the left or right and she will have all 4 sides because a rectangle has 2 sets of equal sides.