Question

AC is a diagonal of parallelogram ABCD. Which is the angleBCA?

@jim_thompson5910 can you help me?

Answer 1

or @ArkGoLucky

Answer 2

A+B is 180

Answer 3

That means angleABC+angleBCA+angleACD=180. You know angle ABC = 80 and angle ACD=40 so you can substitute 80+angleBCA+40=180 and find angleBCA

Answer 4

60 degrees?

Answer 5

@ArkGoLucky

Answer 6

Nice. That's right

Answer 7

Thank you! Will you help me with this last one, please?

Answer 8

Sure

Answer 9

What is m<FEH?

Answer 10

In a rhombus, opposite angles are equal and the sum of the interior angles is 360. The answer becomes 50

Answer 11

Thank you I appreciate it!!

Answer 12

Alternative Method:


With any parallelogram, the adjacent angles are supplementary. So they add to 180 degrees.


Angle E + Angle H = 180

Angle E + 130 = 180

Angle E + 130 - 130 = 180 - 130

Angle E = 50 degrees