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Polygons. Abney V. Martinez. Polygon. 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 . . Tell which shapes are polygons. .

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Polygons

Polygons

Abney

V. Martinez


Polygon
Polygon

  • 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.

Tell which shapes are polygons.


Triangles are polygons we can classify them by their sides
Triangles are polygons. We can classify them by their sides.

Scalene, equilateral, isosceles

Scalene triangles have no sides the same length.


Isosceles triangles
Isosceles triangles

2 sides the same length

2 eyes – 2 equal sides


Equilateral triangle
Equilateral Triangle

  • Equal sides

All sides the same length


Triangles can be classified by angles
Triangles can be classified by angles

  • Right triangle

  • Acute triangle

  • Obtuse triangle

Think about angles


Right triangle
Right triangle

A right triangle has a right angle

A right angle makes a perfect square corner.


Acute triangles
Acute triangles

Acute angles _ less than 90 degrees

Just look at the angles – not the sides


Obtuse triangles
Obtuse Triangles

Obtuse – greater than 90 degrees

Can you tell which angle is obtuse?


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