# 11 26 28 triangle

### Acute scalene triangle.

Sides: a = 11   b = 26   c = 28

Area: T = 142.9633063412
Perimeter: p = 65
Semiperimeter: s = 32.5

Angle ∠ A = α = 23.12660741872° = 23°7'34″ = 0.40436261376 rad
Angle ∠ B = β = 68.1766214748° = 68°10'34″ = 1.19898994189 rad
Angle ∠ C = γ = 88.69877110648° = 88°41'52″ = 1.54880670971 rad

Height: ha = 25.99332842566
Height: hb = 10.9977158724
Height: hc = 10.21216473865

Median: ma = 26.45327881328
Median: mb = 16.83774582405
Median: mc = 14.23302494708

Inradius: r = 4.39988634896
Circumradius: R = 14.00436171038

Vertex coordinates: A[28; 0] B[0; 0] C[4.08992857143; 10.21216473865]
Centroid: CG[10.69664285714; 3.40438824622]
Coordinates of the circumscribed circle: U[14; 0.31882640251]
Coordinates of the inscribed circle: I[6.5; 4.39988634896]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.8743925813° = 156°52'26″ = 0.40436261376 rad
∠ B' = β' = 111.8243785252° = 111°49'26″ = 1.19898994189 rad
∠ C' = γ' = 91.30222889352° = 91°18'8″ = 1.54880670971 rad

# How did we calculate this triangle?

Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.

### 8. Calculation of medians

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See more informations about triangles or more information about solving triangles.