🔺 Triangle Calculator
Solved triangle (right scalene)
A = 36.87°, B = 53.13°, C = 90°
Sides 3, 4, 5
- Area
- 6
- Perimeter
- 12
- Type
- right scalene
| Sides a, b, c | 3, 4, 5 |
| Angles A, B, C | 36.8699°, 53.1301°, 90° |
| Angles in radians | 0.6435, 0.9273, 1.5708 |
| Heights hₐ, h_b, h_c | 4, 3, 2.4 |
| Semi-perimeter s | 6 |
| Inradius r = Area ÷ s | 1 |
| Circumradius R = a ÷ (2 sin A) | 2.5 |
Step by step
- Law of cosines: A = arccos((b² + c² − a²) ÷ 2bc) = arccos((4² + 5² − 3²) ÷ (2 × 4 × 5)) = 36.8699°
- B = arccos((a² + c² − b²) ÷ 2ac) = 53.1301°
- C = 180° − A − B = 90°
- Area (Heron’s formula): √(s(s − a)(s − b)(s − c)) = √(6 × 3 × 2 × 1) = 6
- Perimeter: 3 + 4 + 5 = 12