This angle plus this angle is going to be equal to this angle.

So angle angle side orange sorry, orange angle white angle side

Man 2 unclear

non labeled to pink to green CBD and this comes out of angle side angle congruency

Given angle A.

Now what else can we figure out?

And that's the best angle of the courtyard?

Well, you might realize that we've just shown that both of these triangles, they have this pink angle and they have this side in common and then they have the green angle

Now, we know that corresponding angles must be congruent

Obviously, this is a right angle

White angle, orange angle, and then the unlabeled angle on that triangle right over there

Now the other thing that we know

and we know that by corresponding angles congruent of congruent triangles

So, for example, we wanna prove that CAB is congruent to BDC

That means intelligent people are in this angle. That is intelligence.

We know that this angle right here, I'll draw it small, is congruent to this angle over here.

Is adjacent to this green angle and if you add them together you're going to get this right angle

So let me write that down again

I could call that point E if I want

Maximum angle from vertical

We were given if that is 90 degrees then this angle over here is supplementary to it and it also has to be 90 degrees.

And the reason it's like that is because it's dead boring to have a load of concentric circles, whereas that's much more exciting, to look at something at that angle, isn't it?

Well angle BDC and I'm just gonna mark this up here

And so, if this angle is congruent to that angle, that angle is congruent to that angle, then they're congruent to each other

If you are a housewife, you voice your opinions about everyday concerns.

So this is 48 degrees.

So 8, we know that angle EDB is going to be equal to angle FDC

Well this here is 58 degrees

Тэдгээр нь энд буй анхны гурвалжины хэмжээнүүд юм. .

It was a huge event.

Now, we can use that exact same logic

So you could call this one, its measure is going to be 90 minus theta

And then we also know the angle ABF, ABF is equal to angle ACE or you could see their measures are equal or this just implies that they are congruent so they have the same measures

This is a right angle

So we know that this is a right angle

And so that maybe becomes part of the draw and part of the labyrinth.

So, angle EBD is going to be congruent to angle BAC or I could say CAB they are corresponding angles

But I wanna make it clear this is not happening overnight.

And if you look at it that way you'll immediately see that angle

Now, you can make design mistakes.

Now, both of these triangles are also isosceles triangles, so their base angles are going to be the same. So that's one base angle, that's the other base angle.

Alternate interior angles must be congruent

I could extend that line out there, and I'd say, oh, that's 60 degrees.

This is a 90 degree angle here.

And I'll talk about more types of angles in the next video, but if an angle is less than 90 degrees so for example both of these angles that we started our discussion with are less than 90 degrees we call them acute angles.