# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 30.02   b = 30.02   c = 42.45

Area: T = 450.6600188998
Perimeter: p = 102.49
Semiperimeter: s = 51.245

Angle ∠ A = α = 45.00663306977° = 45°23″ = 0.78655086549 rad
Angle ∠ B = β = 45.00663306977° = 45°23″ = 0.78655086549 rad
Angle ∠ C = γ = 89.98773386046° = 89°59'14″ = 1.57105753438 rad

Height: ha = 30.0219999267
Height: hb = 30.0219999267
Height: hc = 21.23296908833

Median: ma = 33.56604134361
Median: mb = 33.56604134361
Median: mc = 21.23296908833

Inradius: r = 8.79330566689
Circumradius: R = 21.22550005182

Vertex coordinates: A[42.45; 0] B[0; 0] C[21.225; 21.23296908833]
Centroid: CG[21.225; 7.07765636278]
Coordinates of the circumscribed circle: U[21.225; 0.0054690365]
Coordinates of the inscribed circle: I[21.225; 8.79330566689]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 134.9943669302° = 134°59'37″ = 0.78655086549 rad
∠ B' = β' = 134.9943669302° = 134°59'37″ = 0.78655086549 rad
∠ C' = γ' = 90.01326613954° = 90°46″ = 1.57105753438 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    