Question

Find the value of x in the parallelogram below.

http://roads.advancedacademics.com/contentserver/content/roadssection/279497/questions/assessments/q-quadrilateralspolygonsunitexam/geometry_unit5_exam_final_34q.gif

A. 102.3°
B. 127°
C. 53°
D. 106°

Answer 1

What do you know about the properties of angles in a parallelogram?

Answer 2

i know nothing, online school does not teach you, it gives you answers and you have to chose. basically the worst decision of my life, i always feel stupid now, which is why im looking for help all the time.

Answer 3

Why don't you read the explanations?

Answer 4

Well, there are two things that will be helpful to solve this.
1) the sum of the interior angles in a polygon with n sides is (n-1)*180 degrees
2) the diagonally opposite angles in a parallelogram are congruent (equal)

Answer 5

Crap, that should be (n-2)*180

Answer 6

soo, if i have the four sides i do (4-1)*180 ??? doesnt seem right.

Answer 7

No, I fat-fingered the formula, it should be (4-2)*180.

Answer 8

oh, thats what i read i just typed the first one, cause thats what i was looking at. my bad. okay. thank you!

Answer 9

So, do you have an answer now?

Answer 10

360 ? (:

Answer 11

oh, thats clearly not right. nevermind, then no. hah.