Geomatrical Figure

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Geomatrical Figure

• Present to
• M.Veerasakdi

By Jaruphat Zhang Class P.4/6 No.43
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Types of Quadrilaterals
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Rectangle

• A rectangle is a four-side shape where every
  angle is a right angle (90).
• Also opposite sides are parallel and of equal
  length.

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Square

• A square has equal sides and every angle is
  right angle (90º)
• Also opposite sides are parallel.

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Parallelogram

• Opposite sides are parallel and equal in length,
  and opposite angles are equal
• (angle a are the same, and angles b are the
  same)

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Rhombus

• A rhombus is a four-sided shape where all sides
  have equal length.
• Also opposite side are parallel amd opposite
  angles are equal.

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Triangles

• There are several different types of triangles.
• You can classify a triangle by its sides and its
  angles.
• There are THREE different classifications for
  triangles based on their sides.
• There are FOUR different classifications for
  triangles based on their angles.

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Classifying Triangles by Sides

• EQUILATERAL - 3 congruent sides

ISOSCELES at least two sides congruent
SCALENE no sides congruent
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Classifying Triangles by Angles

• EQUIANGULAR all angles are congruent
• ACUTE all angles are acute
• RIGHT one right angle
• OBTUSE one obtuse angle

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Can You Classify the Different Triangles in the
Picture Below?

• Classify the following triangles AED, ABC, ACD,
  ACE

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The Classifications

• Triangle AED Equilateral, Equiangular
• Triangle ABC Equilateral, Equiangular
• Triangle ACD Isoceles, Obtuse
• Triangle ACE Scalene, Right
• So how did you do?