# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 4   b = 10   c = 10

Area: T = 19.59659179423
Perimeter: p = 24
Semiperimeter: s = 12

Angle ∠ A = α = 23.07439180656° = 23°4'26″ = 0.40327158416 rad
Angle ∠ B = β = 78.46330409672° = 78°27'47″ = 1.3699438406 rad
Angle ∠ C = γ = 78.46330409672° = 78°27'47″ = 1.3699438406 rad

Height: ha = 9.79879589711
Height: hb = 3.91991835885
Height: hc = 3.91991835885

Median: ma = 9.79879589711
Median: mb = 5.74545626465
Median: mc = 5.74545626465

Inradius: r = 1.63329931619
Circumradius: R = 5.10331036308

Vertex coordinates: A[10; 0] B[0; 0] C[0.8; 3.91991835885]
Centroid: CG[3.6; 1.30663945295]
Coordinates of the circumscribed circle: U[5; 1.02106207262]
Coordinates of the inscribed circle: I[2; 1.63329931619]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.9266081934° = 156°55'34″ = 0.40327158416 rad
∠ B' = β' = 101.5376959033° = 101°32'13″ = 1.3699438406 rad
∠ C' = γ' = 101.5376959033° = 101°32'13″ = 1.3699438406 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.