SME
Grade 5 Math · Problem type
Classify triangles by angles
Use this for “Is the triangle acute, right or obtuse?”
Sort
What is its biggest angle: smaller than, equal to, or bigger than a square corner?
Tap a card, then tap its group.
Assumptions
•
A right angle is a square corner. An acute angle is smaller, an obtuse angle is bigger.
•
A right triangle has one right angle. An obtuse triangle has one obtuse angle.
•
An acute triangle has three acute angles. A triangle can have only one angle that is not acute.
← Previous lesson
Classify triangles by sides
Next lesson →
Relate quadrilaterals: always, sometimes, never
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.