Constructible number

A constructible number is a number which corresponds to ratios of line segments which can be constructed using only straightedge and compass102 CHAPTER 3. SYMMETRIES.
==Algebraic properties==
The definition of algebraically constructible numbers includes the sum, difference, product, quotient, square root of integers.
== In googology ==
*The golden ratio, equal to \((1+\sqrt{5})/2\), used to approximate numbers like fibonamega, fibonagygas and fibonatetris.
*The sesquillion, equal to 103*1.5+3 = 107.5 ≈ 31622776.60168. The term is also an obscure alternative to "zillion" to refer to an indefinite large number.
== Sources ==
Category:Numbers