Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 153   b = 90   c = 179.91

Area: T = 6881.653310868
Perimeter: p = 422.91
Semiperimeter: s = 211.455

Angle ∠ A = α = 58.21329538663° = 58°12'47″ = 1.01660077123 rad
Angle ∠ B = β = 300.0004595932° = 30°2″ = 0.5243606797 rad
Angle ∠ C = γ = 91.78765865405° = 91°47'12″ = 1.60219781443 rad

Height: ha = 89.95662497866
Height: hb = 152.9265624637
Height: hc = 76.50110628501

Median: ma = 119.9233117246
Median: mb = 160.8210720214
Median: mc = 87.5366266627

Inradius: r = 32.54442912614
Circumradius: R = 89.99987496055

Vertex coordinates: A[179.91; 0] B[0; 0] C[132.5011273137; 76.50110628501]
Centroid: CG[104.1377091046; 25.55003542834]
Coordinates of the circumscribed circle: U[89.955; -2.80658698403]
Coordinates of the inscribed circle: I[121.455; 32.54442912614]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 121.7877046134° = 121°47'13″ = 1.01660077123 rad
∠ B' = β' = 1509.999540407° = 149°59'58″ = 0.5243606797 rad
∠ C' = γ' = 88.21334134595° = 88°12'48″ = 1.60219781443 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     