What words can be used to classify a triangle by its SIDES?

• right

• isosceles

• acute

• equilateral

• scalene

Tags

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What words can be used to classify a triangle by its ANGLES?

• isosceles

• acute

• right

• equilateral

• obtuse

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TRUE or FALSE

A triangle is a quadrilateral.

• False

• True

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TRUE or FALSE

A triangle is a polygon.

• False

• True

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A triangle is a closed, ​ (a)   shape with ​ (b)   sides, ​ (c)   angles, and ​ (d)   vertices

• 2-dimensional
• 3
• 2
• 3-dimensional
• 4

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The sum of all three angles of a triangle is always equal to ____⁰.

ONLY type the exact number.

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• isosceles

• equilateral

• scalene

• right

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Match the following triangles to the correct description.

• isosceles obtuse triangle

• 
• scalene obtuse triangle

• 
• isosceles right triangle

• 
• scalene right triangle

• 
• equilateral isosceles acute triangle

• 

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Triangles can be classified based by the ​ (a)   of the sides or by the ​ (b)   of the angles.

• length
• measurements
• area
• volume
• dimensions

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Equilateral triangles can also be classified as isosceles triangles because...

• they can be classified as anything.

• they have all acute angles

• they are not scalene triangles.

• they have at least 2 congruent sides

Tags

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