# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 5   b = 21   c = 25

Area: T = 34.29655900955
Perimeter: p = 51
Semiperimeter: s = 25.5

Angle ∠ A = α = 7.50771472486° = 7°30'26″ = 0.13110244369 rad
Angle ∠ B = β = 33.28798909447° = 33°16'48″ = 0.58108436717 rad
Angle ∠ C = γ = 139.2132961807° = 139°12'47″ = 2.4329724545 rad

Height: ha = 13.71882360382
Height: hb = 3.26662466758
Height: hc = 2.74436472076

Median: ma = 22.95110348351
Median: mb = 14.65443508898
Median: mc = 8.7610707734

Inradius: r = 1.34549251018
Circumradius: R = 19.13551132368

Vertex coordinates: A[25; 0] B[0; 0] C[4.18; 2.74436472076]
Centroid: CG[9.72766666667; 0.91545490692]
Coordinates of the circumscribed circle: U[12.5; -14.48880143078]
Coordinates of the inscribed circle: I[4.5; 1.34549251018]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 172.4932852751° = 172°29'34″ = 0.13110244369 rad
∠ B' = β' = 146.7220109055° = 146°43'12″ = 0.58108436717 rad
∠ C' = γ' = 40.78770381933° = 40°47'13″ = 2.4329724545 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.