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# Learner Guide

Polygons

Online Math Helper

Polygons are 2D shapes that have straight lines and are closed(The lines are

connected).

You can have regular polygons, that have sides that are all the same length,

or irregular polygons, with different length sides.

This is a regular hexagon. It has six sides which are all the same length and

connects up.

This is an irregular hexagon. It is also a shape with six sides,but the sides are

different lengths.

Triangles

All triangles are polygons but there are more types than just regular and

irregular triangles.

This is an equilateral triangle (regular). All the angles inside are 60o and the

sides are the same length.

This is an isosceles triangle. Two of its angles are the same and two of its

sides are the same length.

This is a right-angled triangle. There is one 90o angle inside it.

This is a scalene triangle. None of its angles are the same and none of its

sides are the same

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