Triangle Types Comparison
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Triangle Types Comparison
Read the design notes
The trail team records three side lengths and one angle fact for each sign design. All measurements are in centimetres.
Design
Side lengths
Angle information
A
5, 5, 5
All angles are 60°
B
5, 5, 8
No angle is 90°
C
3, 4, 5
One angle is 90°
D
4, 6, 7
All angles are less than 90°
Classify and compare
Use the design notes above. Remember: equilateral, isosceles and scalene describe side lengths; acute, right-angled and obtuse describe angles.
- Equilateral
- Isosceles
- Scalene
- Right-angled
- They have three sides.
- Their interior angles add to 180°.
- They have at least one right angle.
- They have three vertices.
- All three sides are equal.
Sketch a new sign
Create your own triangle sketches. Mark equal sides with matching tick marks and show any right angle with a small square corner.
2 printable pages
Page 1
Page 2
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