Geometric Isosceles Triangle

This becomes an isosceles triangle again, very shaky.

This is an upside down isosceles triangle, this is a right side up one.

You could think of an isosceles triangle, over here.

Angle of the trajectory, multiplied by the square root of an isosceles triangle,

They are going to be the same to each other, because this is an isosceles triangle.

Statement right here is triangle BAF triangle BAF

Geometric Right Angle Triangle

It's a right triangle.

An altitude by definition is going to be perpendicular down here. Now, an isosceles triangle is perfectly symmetrical.

larger triangle right up there

This is a right triangle.

So this is a right triangle.

So this is a right triangle.

Say we have a right triangle.

If you drop an altitude from the the top, or the unique angle, or the unique vertex in an isosceles triangle you will split it into two symmetric right triangles.

Let's draw an arbitrary triangle right over here. now let's say that is our triangle.

So a right triangle is a triangle that has a 90 degree angle in it.

It's a right triangle, let me put some

And since that is a triangle that has a 90 degree angle, it's a right triangle.

And it's also an isosceles triangle, so that means it has to have at least two sides equal, and has two sides of length 3.

And now, what's the area of just this right triangle right here?

BAF so that's this entire triangle right over here

Let me draw my right triangle just like that.

So let's say I have the following right triangle.

Triangle

Triangle

triangle

Triangle

Triangle

Triangle

And the Pythagorean theorem tells us that if we're dealing with a right triangle let me write that down if we're dealing with a right triangle not a wrong triangle if we're dealing with a right triangle, which is a triangle that has a right angle, or a 90 degree angle in it, then the relationship between their sides is this.

And this is a very typical type of right triangle.

So as I mentioned already, this is a right triangle.

So let's look at this first triangle right over here.

So let me draw some right triangles, let me just draw one right triangle.

Triangle ABC equals Triangle Aprime, Bprime, Cprime.

You only have a hypotenuse when you have a right triangle.

smooth triangle

Equilateral Triangle

Triangle. Doctor

So it's a right angle, it's isosceles (at least two sides are equal), and the two sides have length 3.

Maybe the base of the triangle right over here is 4. and then the hypotenuse of the triangle over here is 5.

Any isosceles triangle, of that side equal to that side, if you drop an altitude, these two triangles are going to be symmetric, and you will have bisected the opposite side.

And we know that, if we know two sides of a right triangle, we can always figure out the third side of a right triangle using the Pythagorean theorem.