Euclid’s Elements includes five postulates on which the rest of geometry is based.

describe in your own words and draw an illustration

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.  

describe in your own words and draw an illustration 

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?

anonymous · Answer

Maybe something like this

 |dw:1374291408944:dw|

anonymous · Answer

okay. but what should i do for number three ?

anonymous · Answer

We'll need a random point to act as the center for our circle so maybe we can draw a series of pictures. The first is just a point, the second would be a line extending from that point, and the 3 would be the circle centered at the point with the line segment acting as its radius.