00:21 Let's find the area of parallelogram, D-E-F-A. Alright?
00:27 Remember, in a parallelogram, opposite sides are parallel.
00:32 A side parallel to one line, is also parallel to that line's extension.
00:38 Also, corresponding angles between parallel lines are the same. Keep that in mind.
00:46 Once more, opposite sides are parallel in a parallelogram.
00:51 And, corresponding angles between these lines are equal.
01:06 Now, let's talk about the transversal rule.
01:15 The triangles here are similar by the A-A-A rule, meaning, angle-angle-angle.
01:22 Find the similarity ratio by dividing the matching sides.
01:28 Put in the given values to find D-E. Alright, let's do that.
01:33 Next, we need to isolate D-E. Almost there!
01:37 And this gives us the length of side D-E.
01:42 To find the area of the parallelogram, multiply height, H, by side, D-E.
01:48 Substitute the values and solve to find the area.
01:53 And that's how we solve the problem. Great job!