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Encyclopedia>Geometry>Planar Figures>Triangles>Triangle Attributes

Triangle Attributes

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Planar Figures
ConceptsQuadrilateralsTriangles
Triangle AttributesThe Pythagorean TheoremConcurrent Lines and Collinear Points
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  • What Is a Triangle?

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    Article on What Is a Triangle?
    Read here
  • What Is the Sum of Angles of a Triangle?

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    Article on What Is the Sum of Angles of a Triangle?
    Read here
  • What Is the Formula for the Perimeter of a Triangle?

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    Article on What Is the Formula for the Perimeter of a Triangle?
    Read here
  • What Is the Formula for the Area of a Triangle?

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    Article on What Is the Formula for the Area of a Triangle?
    Read here
  • What Are 30°–60°–90° Triangles?

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    Article on What Are 30°–60°–90° Triangles?
    Read here
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