00:01
Okay, so at the top we have two quadrilaterals asking if it's a rectangle.
00:05
So the first one, they're saying that opposite angles are congruent.
00:11
And here, opposite angles are congruent.
00:14
In a rectangle, all four angles have to be congruent, have to be right angles.
00:20
So for this one, i would say no.
00:23
Over here, you've got opposite sides are congruent.
00:28
So that's good for a rectangle.
00:30
And then you also are showing a right angle there in the corner.
00:34
So this one is a yes.
00:38
All right.
00:39
Then they give you two lengths of diagonals, and they want to know what the actual length is.
00:48
So first we have to solve for x.
00:50
In a rectangle, the diagonals are congruent.
00:54
So what i can do is i can set them equal to each other.
01:01
And solve for x...