# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 13.5   b = 9.6   c = 9.4

Area: T = 45.11879270773
Perimeter: p = 32.5
Semiperimeter: s = 16.25

Angle ∠ A = α = 90.54992199499° = 90°32'57″ = 1.58803820232 rad
Angle ∠ B = β = 45.32327281209° = 45°19'22″ = 0.79110308317 rad
Angle ∠ C = γ = 44.12880519292° = 44°7'41″ = 0.77701797987 rad

Height: ha = 6.68441373448
Height: hb = 9.43995681411
Height: hc = 9.65995589526

Median: ma = 6.68656188943
Median: mb = 10.59655179203
Median: mc = 10.72991658576

Inradius: r = 2.77664878201
Circumradius: R = 6.75503101257

Vertex coordinates: A[9.4; 0] B[0; 0] C[9.49220212766; 9.65995589526]
Centroid: CG[6.29773404255; 3.21998529842]
Coordinates of the circumscribed circle: U[4.7; 4.84552746871]
Coordinates of the inscribed circle: I[6.65; 2.77664878201]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 89.45107800501° = 89°27'3″ = 1.58803820232 rad
∠ B' = β' = 134.6777271879° = 134°40'38″ = 0.79110308317 rad
∠ C' = γ' = 135.8721948071° = 135°52'19″ = 0.77701797987 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    