# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 26   b = 28   c = 28

Area: T = 322.3989515959
Perimeter: p = 82
Semiperimeter: s = 41

Angle ∠ A = α = 55.32880089924° = 55°19'41″ = 0.96656559255 rad
Angle ∠ B = β = 62.33659955038° = 62°20'10″ = 1.0887968364 rad
Angle ∠ C = γ = 62.33659955038° = 62°20'10″ = 1.0887968364 rad

Height: ha = 24.79991935353
Height: hb = 23.02878225685
Height: hc = 23.02878225685

Median: ma = 24.79991935353
Median: mb = 23.10884400166
Median: mc = 23.10884400166

Inradius: r = 7.86331589258
Circumradius: R = 15.80769656355

Vertex coordinates: A[28; 0] B[0; 0] C[12.07114285714; 23.02878225685]
Centroid: CG[13.35771428571; 7.67659408562]
Coordinates of the circumscribed circle: U[14; 7.33989483308]
Coordinates of the inscribed circle: I[13; 7.86331589258]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 124.6721991008° = 124°40'19″ = 0.96656559255 rad
∠ B' = β' = 117.6644004496° = 117°39'50″ = 1.0887968364 rad
∠ C' = γ' = 117.6644004496° = 117°39'50″ = 1.0887968364 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.