Triangle Classification Worksheet
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Triangle Classification Worksheet
📐 Part 1: Classification by Angles
WALT: We Are Learning To classify triangles by their angles: acute, right, and obtuse.
Success Criteria: I can identify and name acute, right, and obtuse angles in triangles and use correct mathematical vocabulary.
Triangle A: Angles: 55°, 65°, 60°
Classification: _________________ (acute/right/obtuse)
Triangle B: Angles: 90°, 45°, 45°
Classification: _________________ (acute/right/obtuse)
Triangle C: Angles: 100°, 40°, 40°
Classification: _________________ (acute/right/obtuse)
Acute Triangle:
Right Triangle:
📏 Part 2: Classification by Sides
WALT: We Are Learning To classify triangles by their sides: equilateral, isosceles, and scalene.
Success Criteria: I can identify triangles by side lengths and know key angle properties.
Triangle D: Sides: 6cm, 6cm, 6cm
Classification: _________________ (equilateral/isosceles/scalene)
All angles are: _______°
Triangle E: Sides: 5cm, 5cm, 7cm
Classification: _________________ (equilateral/isosceles/scalene)
The two equal angles are called: _________ angles
Triangle F: Sides: 4cm, 5cm, 6cm
Classification: _________________ (equilateral/isosceles/scalene)
🎯 Part 3: Apply Your Knowledge
Example: A triangle with sides 3cm, 4cm, 5cm and angles 90°, 53°, 37°
Classification by angles: ________________
Classification by sides: ________________
Acute Scalene Triangle:
Right Isosceles Triangle:
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