Triangles

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Triangles - PowerPoint PPT Presentation

Triangles. Classified by their SIDES and by their ANGLES. Triangles Classified by their SIDES. Equilateral : All sides are congruent Isosceles : At least 2 sides are congruent Scalene : None of the sides are congruent. Triangles Classified by their ANGLES.

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Triangles

Classified by their SIDES and by their ANGLES.

TrianglesClassified by their SIDES
• Equilateral: All sides are congruent
• Isosceles: At least 2 sides are congruent
• Scalene: None of the sides are congruent
TrianglesClassified by their ANGLES
• Acute: all 3 angles are acute angles
• Obtuse: 1 obtuse angle (leaving 2 acute angles)
• Right: 1 right angle (leaving 2 acute angles)

4-sided figures

Parallelogram
• Opposite sides are congruent
• Opposite sides are parallel
Rectangle
• Opposite sides are congruent
• Opposite sides are parallel
• 4 right angles
Square
• Opposite sides are congruent
• Opposite sides are parallel
• 4 right angles
• 4 congruent sides
Rhombus
• Opposite sides are congruent
• Opposite sides are parallel
• 4 congruent sides
Trapezoid
• One pair of parallel sides