Triangle types
1. 8, 11, 14: scalene2. 55°, 60°, 65°: acute3. 30°, 60°, 90°: right4. 20°, 50°, 110°: obtuse5. 20°, 40°, 120°: obtuse6. 16, 19, 19: isosceles7. 7, 7, 7: equilateral8. 20°, 70°, 90°: rightTriangle angle sum
1. 40° + 65° = 105°: 75°2. 60° + 85° = 145°: 35°3. 30° + 30° = 60°: 120°4. 30° + 55° = 85°: 95°5. 30° + 65° = 95°: 85°6. 25° + 40° = 65°: 115°7. 65° + 75° = 140°: 40°8. 35° + 35° = 70°: 110°Exterior angle
1. 30° + 55°: 85°2. 25° + 100°: 125°3. 45° + 55°: 100°4. 45° + 100°: 145°5. 55° + 80°: 135°6. 45° + 70°: 115°7. 45° + 50°: 95°8. 35° + 35°: 70°Isosceles angles
1. base 50°: 80°2. base 30°: 120°3. base 35°: 110°4. apex 90°: 45°5. apex 70°: 55°6. base 75°: 30°7. apex 30°: 75°8. base 55°: 70°Pythagoras
1. 20, 21, 29 — hypotenuse: 29 cm2. 24, 32, 40 — leg: 32 cm3. 15, 20, 25 — leg: 20 cm4. 12, 35, 37 — hypotenuse: 37 cm5. 18, 24, 30 — hypotenuse: 30 cm6. 5, 12, 13 — leg: 12 cm7. 3, 4, 5 — hypotenuse: 5 cm8. 6, 8, 10 — leg: 8 cm