Euclid’s Elements includes five postulates on which the rest of geometry is based. They are:
1. Let it have been postulated to draw a straight-line from any point to any point.
2. And to produce a finite straight-line continuously in a straight-line
3. And to draw a circle with any center and radius
4. And that all right-angles are equal to one another
*******
3 just says that you can draw a circle centered at a given point using a compass

4 says that all right angles (or 90 degree angles) are equal (to 90)

how would i draw these last two?

Question

Euclid’s Elements includes five postulates on which the rest of geometry is based.  They are:
1.	Let it have been postulated to draw a straight-line from any point to any point.
2.	And to produce a finite straight-line continuously in a straight-line
3.	And to draw a circle with any center and radius
4.	And that all right-angles are equal to one another
*******
3 just says that you can draw a circle centered at a given point using a compass

4 says that all right angles (or 90 degree angles) are equal (to 90)

how would i draw these last two?