# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 10   b = 23   c = 30

Area: T = 92.92443644046
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 15.62553527918° = 15°37'31″ = 0.2732713853 rad
Angle ∠ B = β = 38.27993217379° = 38°16'46″ = 0.66881001998 rad
Angle ∠ C = γ = 126.095532547° = 126°5'43″ = 2.20107786008 rad

Height: ha = 18.58548728809
Height: hb = 8.08803795134
Height: hc = 6.1954957627

Median: ma = 26.2588332011
Median: mb = 19.17768089108
Median: mc = 9.46604439642

Inradius: r = 2.95499798224
Circumradius: R = 18.56334845183

Vertex coordinates: A[30; 0] B[0; 0] C[7.85; 6.1954957627]
Centroid: CG[12.61766666667; 2.06549858757]
Coordinates of the circumscribed circle: U[15; -10.93663137054]
Coordinates of the inscribed circle: I[8.5; 2.95499798224]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 164.3754647208° = 164°22'29″ = 0.2732713853 rad
∠ B' = β' = 141.7210678262° = 141°43'14″ = 0.66881001998 rad
∠ C' = γ' = 53.90546745297° = 53°54'17″ = 2.20107786008 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    