# 4.24 5.1 2.83 triangle

### Obtuse scalene triangle.

Sides: a = 4.24   b = 5.1   c = 2.83

Area: T = 65.9995971235
Perimeter: p = 12.17
Semiperimeter: s = 6.085

Angle ∠ A = α = 56.24399501064° = 56°14'24″ = 0.98215723005 rad
Angle ∠ B = β = 90.05661058668° = 90°3'22″ = 1.57217755589 rad
Angle ∠ C = γ = 33.70439440268° = 33°42'14″ = 0.58882447942 rad

Height: ha = 2.83299986432
Height: hb = 2.35327831857
Height: hc = 4.24399979671

Median: ma = 3.53876616571
Median: mb = 2.54876950367
Median: mc = 4.47111939121

Inradius: r = 0.98659650162
Circumradius: R = 2.55500012226

Vertex coordinates: A[2.83; 0] B[0; 0] C[-0.00441519435; 4.24399979671]
Centroid: CG[0.94219493522; 1.41333326557]
Coordinates of the circumscribed circle: U[1.415; 2.12113866303]
Coordinates of the inscribed circle: I[0.985; 0.98659650162]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 123.7660049894° = 123°45'36″ = 0.98215723005 rad
∠ B' = β' = 89.94438941332° = 89°56'38″ = 1.57217755589 rad
∠ C' = γ' = 146.2966055973° = 146°17'46″ = 0.58882447942 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    