BFOIT - Introduction to Computer Programming
Background
jLogo Programming
- Commanding a Turtle
- Pseudocode
- Adding New Commands
- Iteration & Animation
- Hierarchical Structure
- Procedure Inputs
- Primitive Operators
- Defining Operators
- Words & Sentences
- User Interface Events
- What If? (Predicates)
- Recursion
- Local Variables
- Global Variables
- Word/Sentence Iteration
- Mastermind Project
- Turtles As Actors
- Arrays
- File Input/Output
Java
- A Java Program
- What's a Class?
- Extending Existing Classes
- Types
- Turtle Graphics
- Control Flow
- User Interface Events
Appendices
- Jargon
- What Is TG?
- TG Directives
- jLogo Primitives
- TG Editor
- Java Tables
- Example Programs
- Installation Notes
Updates
- December 13, 2008
- March 7, 2009
- January 6, 2012
- March 15, 2013
- January 20, 2014
- February 13, 2014
- July 29, 2014
Lastly
Circles
Definitions of a Circle, Chords, Tangent and Secant Lines
- This section introduces the properties of the circles. We start with the definition of this geometric object. A circle is the set of all points in a plane at a fixed distance from a fixed point in the plane. The fixed point is called the center of the circle. The fixed distance is called the radius of the circle. A segment from a point of the circle to the center is also called a radius. Usually a circle is named by its center e.g. circle O. Sometimes we are also going to specify the radius r of the circle and name the circle as (O, r).
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- We say that two circles are congruent if they have the same radius.
- If two or more circles share the same center then they are called concentric circles.
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- A segment that connects two distinct points on a circle is called a chord.
- A chord that passes through the center of a circle is called a diameter.
- A line that intersects with the circle at exactly two points is called a secant (line).
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This webpage is from the Penn State University Elementary Geometry Tutorial by Anna Koltsova.
