Back

SCIENTIFIC METHOD
Lesson 5 - Page 1

Next 

LESSON 5.  Variable Based Triangle

 Let’s investigate a basic design.  A simplest polygon is a triangle, composing of only three sides and three angles.  The triangle is structural a rigid and sturdy shape.  In simple machine terms it would be a wedge.  If you look around you see many structures that use a triangle as a base.  Even, if you look at the roof of many structures you can immediately see the triangle.

You can classify triangles by sides and by angles. There are three basic shapes by sides including equilateral, isosceles, and scalene.   An equilateral triangle has three equal sides.  In this type of triangle, the angles are all equal (equiangular).  An isosceles triangle has just two equal sides.  The third side is called the base and the two equal sides are called legs.  Triangles with three sides of different lengths are called a scalene triangle.