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.

Grade 4th Grade · Math · 45 min

I can sort triangles and quadrilaterals by their attributes.

mathantics · 7:40

Math Antics - Triangles

3 key concepts

1
Triangles are polygons that always have 3 sides and 3 angles.
2
Triangles can be classified by their sides and by their angles.
3
The three classifications for triangles based on their sides are: equilateral, isosceles, and scalene.

9 questions · Multiple choice & Short answer

Quick comprehension check

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

Get the complete package: