### Geometry dedicated website – follow link below

http://www.mathsisfun.com/geometry/index.html

### Basic Geometric Constructions – follow link below

http://www.graphicalcommunication.com/indexbasicgeometric.php

### Inscribed, Circumscribed, and Escribed circles – follow link below

http://www.graphicalcommunication.com/lessonnotes/inscesccirc.php

### The Polygon Song

### The Triangle Song

## Construction of Triangles

*given:*

- 3 sides
- 2 sides and their included angle
- Base, one base angle and the length of the side opposite the base angle
- Base and two base angles
- The base of an equilateral triangle
- The altitude of an equilateral triangle
- Base and altitude of an isosceles triangle
- Length of one side/angle and hypotenuse of a right angle triangle
- 2 base angles and the altitude
- Altitude and apex angle of an isosceles triangle
- Perimeter and the ratio of the three sides
- Perimeter and altitude of an isosceles triangle
- Perimeter and the 2 base angles
- Perimeter, base and base angle
- Base angle, apex angle and altitude

The following are worked examples to illustrate each of the above sets of data.

Triangles 1-6

Triangles 7-12

Triangles 13-15