So, this is from angle side angle congruency

And this comes straight from once again, orange angle white angle side

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

Or this angle plus this angle plus this angle is equal to 180.

Maximum angle from vertical

Select this angle

And we see that this angle and this angle, this angle has a measure of 4x, this angle has a measure of 2x.

This pink angle is supplementary to this 110 degree angle.

So this come straight angle angle side congruency

I could also draw an acute angle maybe an angle that is formed from an intersection of two lines, so this angle would be acute, and so will this angle.

Control, do you copy our star angle difference from parking angle?

And this comes straight out of angle side angle

Attach to this angle

Rotate by this angle

So given this angle.

This angle down here is a vertical angle, that's gonna be a right angle

This is a right angle and then, this is a right angle

Looked at from this angle, theirs becomes a story about reading.

This function transforms a radian angle to a degree angle.

This function transforms a degree angle to a radian angle.

Now if this angle over here is a right angle

And at first you might say, wait, is this angle and that angle vertical angle?

So this angle is theta, we have theta is adjacent to this angle

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

Construct Bisector of This Angle

Projectively rotate by this angle

This is a right angle

One fr om this angle?

So that when you saw from one little angle was like this.

I can't tell from the others, but with this angle right there.

This is a right angle this over here is gonna be a vertical angle

Angle BDC over here, it is an alternate interior angle with this angle right over here with that angle right over there

And so if this angle right over here, if this angle right over here is 4x, it has a corresponding angle.

And we also we make this angle is equal to that angle.

That is a right angle and then this is a right angle

So, we're just saying that this angle is equal to that angle

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

So this pink angle theta plus this green angle must be equal to 90 degrees

So, angle DEC must be let me write this down angle DEC must be congruent to angle BAE

This table is at an angle.

Construct an angle through this point

Construct an angle at this point

Construct an arc with this angle

This is a wide angle camera.

Obviously, this is a right angle