#1**+1 **

Draw a perpendicular line from the top left vertex of the parallelogram to the base.

So...we have a right triangle with a leg of 5.6 in and a hypotenuse of 10 in

The sine of the angle at the bottom left vertex = 5.6 / 10

And since we have a parallelogram, the angle at the top right vertex is the same, so its sine is the same

So...using the Law of Sines we have

9.8/ sin (90) = h / (5.6 / 10 )

9.8 = 10h / 5.6 rearrange as

9.8 * 5.6 / 10 = h = 5.488 in

CPhill May 23, 2018