Classification of Triangles
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Questions and Answers

Which type of triangle has all three sides equal?

  • Acute Triangle
  • Isosceles Triangle
  • Scalene Triangle
  • Equilateral Triangle (correct)
  • What is the classification of a triangle with one angle measuring exactly 90 degrees?

  • Acute Triangle
  • Obtuse Triangle
  • Isosceles Triangle
  • Right Triangle (correct)
  • Which type of triangle has no sides of equal length?

  • Isosceles Triangle
  • Equilateral Triangle
  • Scalene Triangle (correct)
  • Right Triangle
  • An acute triangle is characterized by which of the following?

    <p>All angles less than 90 degrees</p> Signup and view all the answers

    What is true about the angles of a right triangle?

    <p>Only one angle can be right angle</p> Signup and view all the answers

    A triangle where two sides are equal can be classified as which type of triangle?

    <p>Isosceles Triangle</p> Signup and view all the answers

    An isosceles triangle has all three sides of equal length.

    <p>False</p> Signup and view all the answers

    A triangle can have multiple right angles.

    <p>False</p> Signup and view all the answers

    Scalene triangles have at least two sides of equal length.

    <p>False</p> Signup and view all the answers

    An obtuse triangle contains an angle greater than 90 degrees.

    <p>True</p> Signup and view all the answers

    All angles in an acute triangle measure exactly 90 degrees.

    <p>False</p> Signup and view all the answers

    Equilateral triangles can be classified as acute triangles.

    <p>True</p> Signup and view all the answers

    Study Notes

    Classification of Triangles by Sides

    • Triangles can be classified based on the lengths of their sides.
    • Equilateral Triangles: All three sides are equal; represented by marking each side with the same symbol.
    • Isosceles Triangles: Two sides are equal; any combination of two sides can be equal while the third side is different.
    • Scalene Triangles: No sides are equal; each side has a different length.

    Classification of Triangles by Angles

    • Triangles can also be classified based on the measures of their angles.
    • Acute Triangles: All angles are less than 90 degrees.
    • Right Triangles: One angle is exactly 90 degrees; also called right-angled triangles.
    • Obtuse Triangles: One angle is greater than 90 degrees, making it obtuse.

    Important Angle Facts

    • An angle less than 90 degrees is termed acute.
    • An angle exactly 90 degrees is a right angle.
    • An angle greater than 90 degrees is an obtuse angle.

    Additional Notes

    • In a right triangle, only one angle can be right; having two right angles is not possible within a triangle's geometric constraints.

    Classification of Triangles by Sides

    • Triangles can be categorized based on side lengths.
    • Equilateral Triangles: All sides are identical in length, denoted by the same symbol on each side.
    • Isosceles Triangles: Two sides have equal lengths; the third side differs, allowing for various combinations of equal sides.
    • Scalene Triangles: All sides are distinct in length, with no equality among them.

    Classification of Triangles by Angles

    • Angles also serve as a basis for triangle classification.
    • Acute Triangles: Each of the three angles measures less than 90 degrees, resulting in all acute angles.
    • Right Triangles: One angle measures exactly 90 degrees; commonly referred to as right-angled triangles.
    • Obtuse Triangles: One angle exceeds 90 degrees, categorizing it as obtuse and impacting the overall shape.

    Important Angle Facts

    • An angle measuring less than 90 degrees is identified as acute.
    • An angle measuring precisely 90 degrees is defined as a right angle.
    • An angle that measures more than 90 degrees is considered obtuse.

    Additional Notes

    • In any right triangle, only one angle can be a right angle; having two right angles contradicts geometric principles.

    Classification of Triangles by Sides

    • Triangles can be categorized based on side lengths.
    • Equilateral Triangles: All sides are identical in length, denoted by the same symbol on each side.
    • Isosceles Triangles: Two sides have equal lengths; the third side differs, allowing for various combinations of equal sides.
    • Scalene Triangles: All sides are distinct in length, with no equality among them.

    Classification of Triangles by Angles

    • Angles also serve as a basis for triangle classification.
    • Acute Triangles: Each of the three angles measures less than 90 degrees, resulting in all acute angles.
    • Right Triangles: One angle measures exactly 90 degrees; commonly referred to as right-angled triangles.
    • Obtuse Triangles: One angle exceeds 90 degrees, categorizing it as obtuse and impacting the overall shape.

    Important Angle Facts

    • An angle measuring less than 90 degrees is identified as acute.
    • An angle measuring precisely 90 degrees is defined as a right angle.
    • An angle that measures more than 90 degrees is considered obtuse.

    Additional Notes

    • In any right triangle, only one angle can be a right angle; having two right angles contradicts geometric principles.

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    Description

    This quiz explores the classification of triangles based on their sides and angles. Learn about equilateral, isosceles, and scalene triangles, as well as angle-based classifications. Test your understanding of these geometric principles.

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