# Triangle calculator SSS - result

Please enter the triangle sides:

### Right scalene triangle.

Sides: a = 145   b = 261.59   c = 299.09

Area: T = 18965.27549996
Perimeter: p = 705.68
Semiperimeter: s = 352.84

Angle ∠ A = α = 298.9996256096° = 28°59'59″ = 0.50661389487 rad
Angle ∠ B = β = 610.9999967543° = 61° = 1.06546507871 rad
Angle ∠ C = γ = 900.0003776361° = 90°1″ = 1.57108029178 rad

Height: ha = 261.5989999994
Height: hb = 1454.999999997
Height: hc = 126.8219853553

Median: ma = 271.4511336523
Median: mb = 195.2765656509
Median: mc = 149.5444164129

Inradius: r = 53.75503542671
Circumradius: R = 149.5455000003

Vertex coordinates: A[299.09; 0] B[0; 0] C[70.29774021198; 126.8219853553]
Centroid: CG[123.129913404; 42.27332845177]
Coordinates of the circumscribed circle: U[149.545; -0.00109856501]
Coordinates of the inscribed circle: I[91.25; 53.75503542671]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 1511.00037439° = 151°1″ = 0.50661389487 rad
∠ B' = β' = 1199.000003246° = 119° = 1.06546507871 rad
∠ C' = γ' = 909.9996223639° = 89°59'59″ = 1.57108029178 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    