The graphometer, semicircle or semicircumferentor is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 degrees and sometimes subdivided into minutes. The limb is subtended by the diameter with two sights at its ends. In the middle of the diameter a "box and needle" (compass) is fixed. On the same middle the alidade with two other sights is fitted. The device is mounted on a staff via a ball and socket joint. In effect the device is a half-circumferentor. For convenience, sometimes another half-circle from 180 to 360 degrees may be graduated in another line on the limb. The form was introduced in Philippe Danfrie's Déclaration de l’usage du graphomètre (Paris, 1597) and the term graphometer was popular with French geodesists. The preferable English-language terms were semicircle or semicircumferentor. Some 19th-century graphometers had telescopic rather than open sights. Le Nôtre's La theorie et la pratique du jardinage ('The theory and practice of gardening'), published in 1709, described the use of the graphometer in transferring geometric shapes from garden plans onto landscapes at a large scale. (Wikipedia).
Introduction to Geometer's Sketchpad: Measurements
This video demonstrates some of the measurement and calculation features of Geometer's Sketchpad.
From playlist Geometer's Sketchpad
GeoGebra Graphing Calculator App: When to Use?
GeoGebra Graphing Calculator is one of the five apps in Calculator Suite. https://www.geogebra.org/calculator
From playlist GeoGebra Apps Intro: Which to USE?
Graph Theory: 02. Definition of a Graph
In this video we formally define what a graph is in Graph Theory and explain the concept with an example. In this introductory video, no previous knowledge of Graph Theory will be assumed. --An introduction to Graph Theory by Dr. Sarada Herke. This video is a remake of the "02. Definitio
From playlist Graph Theory part-1
From playlist GeoGebra Graphing Calculator
What is a Graph? | Graph Theory
What is a graph? A graph theory graph, in particular, is the subject of discussion today. In graph theory, a graph is an ordered pair consisting of a vertex set, then an edge set. Graphs are often represented as diagrams, with dots representing vertices, and lines representing edges. Each
From playlist Graph Theory
Graphing Calculator - Enter and Graph Functions
The most basic aspect of a graphing calculator. Entering and graphing simple functions
From playlist Graphing Calculator - Basic Commands and Operations
Constructing a REGULAR POLYGON: GeoGebra Beginner Exercise 1
Screencast displays how to use the REGULAR POLYGON tool to construct various regular polygons in GeoGebra. Try it yourself here: https://www.geogebra.org/m/NUtDnGgC#material/ez3tzHra
From playlist GeoGebra Geometry & Graphing Calculator: BEGINNER Tutorial Series
I created this video with the YouTube Video Editor (https://www.youtube.com/editor)
From playlist 3d graphs
Quadratic Polynomial - Parameters
GeoGebra Graphing Calculator
From playlist GeoGebra Graphing Calculator
Graph Theory FAQs: 01. More General Graph Definition
In video 02: Definition of a Graph, we defined a (simple) graph as a set of vertices together with a set of edges where the edges are 2-subsets of the vertex set. Notice that this definition does not allow for multiple edges or loops. In general on this channel, we have been discussing o
From playlist Graph Theory FAQs