Classifying Triangles for 4th Grade
To classify a triangle, check its sides and its angles separately: three equal sides makes it equilateral, one right angle makes it right, and a triangle can be both isosceles and right. The examples below work through each case, with practice problems.
DETAILED EXPLANATION
Triangles are classified by sides: scalene (no equal sides), isosceles (two equal sides), equilateral (three equal sides). By angles: acute, right, obtuse.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
What do we call a triangle with three equal sides?
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: An equilateral triangle.
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