00:01
Okay, so we're looking at properties of quadrilaterals and parallelograms.
00:06
So in a quadrilateral, m -a -n -e, a -e, which is right here between these two, and m -n -b -b -d -b -d -rectangle.
00:18
A -b -c -d -d, oh, no, no, sorry, is congruent to cd.
00:33
Sorry, i had that a little bit backwards, because if i have a -b -c -d, okay, a -b -c -d, a -b -b -a.
00:39
B here and c .d here are across from each other, so they have to be congruent.
00:43
Diagonals of a parallelogram bisect each other.
00:48
Opposite angles of a parallelogram are congruent.
00:53
A blank is a quadrilateral with one pair of opposite sides are parallel.
00:57
That is a trapezoid.
01:01
It has only one pair of opposite sides that are parallel.
01:04
Diagonal of a square divides it into two congruent right triangles.
01:17
There'll be consecutive angles of a robbis or supplementary.
01:24
If angle a is congruent to angle c and a c is perpendicular to bd, okay? so let's try drawing that real quick.
01:35
Let's draw it like a square for now.
01:37
So let's say a, b, c, and d.
01:40
So we have angles across from each other are congruent, and a .c is congruent to b, d.
01:48
Okay...