# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 15   b = 23   c = 28

Area: T = 172.3376879396
Perimeter: p = 66
Semiperimeter: s = 33

Angle ∠ A = α = 32.35879982101° = 32°21'29″ = 0.56547536081 rad
Angle ∠ B = β = 55.1550095421° = 55°9' = 0.96325507479 rad
Angle ∠ C = γ = 92.4921906369° = 92°29'31″ = 1.61442882976 rad

Height: ha = 22.97882505862
Height: hb = 14.98658155997
Height: hc = 12.31097770997

Median: ma = 24.5
Median: mb = 19.29437813816
Median: mc = 13.45436240471

Inradius: r = 5.22223296787
Circumradius: R = 14.01332513044

Vertex coordinates: A[28; 0] B[0; 0] C[8.57114285714; 12.31097770997]
Centroid: CG[12.19904761905; 4.10332590332]
Coordinates of the circumscribed circle: U[14; -0.60992717958]
Coordinates of the inscribed circle: I[10; 5.22223296787]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 147.642200179° = 147°38'31″ = 0.56547536081 rad
∠ B' = β' = 124.8549904579° = 124°51' = 0.96325507479 rad
∠ C' = γ' = 87.5088093631° = 87°30'29″ = 1.61442882976 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

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