# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 16   b = 21   c = 26

Area: T = 167.9187948713
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 37.95880285807° = 37°57'29″ = 0.66224925763 rad
Angle ∠ B = β = 53.83327560786° = 53°49'58″ = 0.9439558839 rad
Angle ∠ C = γ = 88.20992153407° = 88°12'33″ = 1.54395412383 rad

Height: ha = 20.99897435891
Height: hb = 15.99221855917
Height: hc = 12.91767652856

Median: ma = 22.23773559579
Median: mb = 18.86113361139
Median: mc = 13.3987761007

Inradius: r = 5.33107285306
Circumradius: R = 13.00663523092

Vertex coordinates: A[26; 0] B[0; 0] C[9.44223076923; 12.91767652856]
Centroid: CG[11.81441025641; 4.30655884285]
Coordinates of the circumscribed circle: U[13; 0.40664485097]
Coordinates of the inscribed circle: I[10.5; 5.33107285306]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.0421971419° = 142°2'31″ = 0.66224925763 rad
∠ B' = β' = 126.1677243921° = 126°10'2″ = 0.9439558839 rad
∠ C' = γ' = 91.79107846593° = 91°47'27″ = 1.54395412383 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.