Abney V. Martinez. Tell which shapes are polygons.  A polygon is a closed plane figure made up of line segments.  Each line segment is a side.  The.

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Presentation transcript:

Abney V. Martinez

Tell which shapes are polygons.  A polygon is a closed plane figure made up of line segments.  Each line segment is a side.  The point where the sides meet is called the vertex.  More than one vertex are vertices.

Scalene, equilateral, isosceles Scalene triangles have no sides the same length.

2 sides the same length2 eyes – 2 equal sides

All sides the same length  Equal sides

Think about angles  Right triangle  Acute triangle  Obtuse triangle

A right triangle has a right angle A right angle makes a perfect square corner.

Acute angles _ less than 90 degrees Just look at the angles – not the sides

Obtuse – greater than 90 degrees Can you tell which angle is obtuse?