Classifying Triangles
There are two ways to classify triangles:
1. Classifying by sides
2. Classifying by angles
1. Classifying by sides
2. Classifying by angles
According to the diagrams above, can an equilateral triangle be an obtuse triangle?
Classify each triangle according to its sides and angles:
a.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
b.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
c.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
d.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
e.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
f.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
g.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
h.
1. acute equilateral
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene
2. acute isosceles
3. acute scalene
4. obtuse equilateral
5. obtuse isosceles
6. obtuse scalene
7. right-angled isosceles
8. right-angled scalene