INTERIOR ANGLE SUM
Draw a regular Hexagon inside a circle of radius 5 cm.
These are four sided polygon
E.g Rhombus , square , rectangle
A Rhombus : construct a Rhombus
Give that one of its diagonals is 6cm
A VIDEO BELOW SHOWING HOW TO CALCULATE THE INTERIOR ANGLE SUM OF A TRIANGLE
POLYGON AND POLYHEDRA
This is a closed plane figure with straight line.
A regular polygon
This is a polygon with all its sides equal and all angles equal.
A convex polygon
A polygon is convex if any of its sides when extended doesn’t cross other sides of the polygon.
A video showing How to Find the Sum of Interior Angles of a Polygon
Construct a square ABCD of side 5cm
- All sides equal
- Measure length of BA and CA
- Name the triangle
- Measure angle ACB and length BC
- Construct a triangle ABC with all sides 8cm
What do you notice about the angle.
It is an equilateral triangle with all sides equal.