# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 15   b = 26   c = 26

Area: T = 186.7110839268
Perimeter: p = 67
Semiperimeter: s = 33.5

Angle ∠ A = α = 33.53217459453° = 33°31'54″ = 0.58552393707 rad
Angle ∠ B = β = 73.23441270273° = 73°14'3″ = 1.27881766415 rad
Angle ∠ C = γ = 73.23441270273° = 73°14'3″ = 1.27881766415 rad

Height: ha = 24.8954778569
Height: hb = 14.36223722514
Height: hc = 14.36223722514

Median: ma = 24.8954778569
Median: mb = 16.77879617356
Median: mc = 16.77879617356

Inradius: r = 5.57334578886
Circumradius: R = 13.57771442619

Vertex coordinates: A[26; 0] B[0; 0] C[4.32769230769; 14.36223722514]
Centroid: CG[10.1098974359; 4.78774574171]
Coordinates of the circumscribed circle: U[13; 3.91664839217]
Coordinates of the inscribed circle: I[7.5; 5.57334578886]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 146.4688254055° = 146°28'6″ = 0.58552393707 rad
∠ B' = β' = 106.7665872973° = 106°45'57″ = 1.27881766415 rad
∠ C' = γ' = 106.7665872973° = 106°45'57″ = 1.27881766415 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.