Triangle Types and Angles
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Triangle Types and Angles
Identify the triangles
Classify each triangle by its sides: three equal sides, exactly two equal sides or no equal sides.
- Equilateral
- Isosceles
- Scalene
Work out the angles
Use the triangle angle sum to find missing angles. Show your calculation where asked.
- Acute: all angles are less than 90°
- Right: one angle is exactly 90°
- Obtuse: one angle is greater than 90°
Design a safety flag
Create a flag pattern for the club using triangles. Include a triangle with three equal sides and an isosceles triangle; label their side lengths and angles. The drawings do not need to be to scale.
2 printable pages
Page 1
Page 2
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