A tool capable of creating and measuring circles and circular profiles of any size without the need for a pivoting center arm. Circle size can be selectively adjusted and held, and both the inside and outside of tool creates and measures circles of a near infinite number of size. The tool contains marking rules such as radius, diameter, arc length, circumference, sector area, area of a circle for any size circle, etc., obviating the need for calculating the same, and any or a combination of unit measure systems can be employed.

A tool capable of creating and measuring circles and circular profiles of any size without the need for a pivoting center arm. Circle size can be selectively adjusted and held, and both the inside and outside of tool creates and measures circles of a near infinite number of size. The tool contains marking rules such as radius, diameter, arc length, circumference, sector area, area of a circle for any size circle, etc., obviating the need for calculating the same, and any or a combination of unit measure systems can be employed.

A geometric divider divides a dimension into equal portions. The geometric divider comprises multiple brachiums, a set of grooves on a first brachium and a second brachium, and multiple slots on at least two brachiums. A base brachium is pivotally connected to a first brachium and a second brachium. A third brachium is configured to slide across the grooves, and corresponding ends of each brachium define multiple mouthpieces to measure the dimension. Each slot is numbered, and a first mouthpiece defined by the base brachium and the first brachium is configured to enclose on the dimension. The third brachium is configured to be selectively pinned in a predetermined numbered slot to determine the number of equal portions to which the dimension is to be divided. An intersection of the third brachium on the dimension divides the dimension to generate a first portion of the equal portions of the dimension.