Explain the difference between an equilateral, an isosceles, and a scalene triangle.

An equilateral triangle has 3 equal sides, an isosceles triangle has 2 equal sides, and a scalene triangle has no equal sides.

Can a triangle have more than one obtuse angle? Explain why or why not.

No, a triangle cannot have more than one obtuse angle because the sum of all angles in a triangle must equal 180 degrees.

4th GradeMath45 min

I can sort triangles and quadrilaterals by their attributes.

8 min

Math Antics - Triangles

mathantics

9 min

Key concepts students will learn:

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Triangles are polygons that always have 3 sides and 3 angles.
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Triangles can be classified by their sides and by their angles.
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The three classifications for triangles based on their sides are: equilateral, isosceles, and scalene.

14 min

9 questions • Multiple choice & Short answer

5 min

“Draw an example of each of the following triangles: acute triangle, obtuse triangle, and right triangle. Label each.”

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