# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 10   b = 15   c = 15

Area: T = 70.71106781187
Perimeter: p = 40
Semiperimeter: s = 20

Angle ∠ A = α = 38.9422441269° = 38°56'33″ = 0.68796738189 rad
Angle ∠ B = β = 70.52987793655° = 70°31'44″ = 1.23109594173 rad
Angle ∠ C = γ = 70.52987793655° = 70°31'44″ = 1.23109594173 rad

Height: ha = 14.14221356237
Height: hb = 9.42880904158
Height: hc = 9.42880904158

Median: ma = 14.14221356237
Median: mb = 10.3087764064
Median: mc = 10.3087764064

Inradius: r = 3.53655339059
Circumradius: R = 7.95549512883

Vertex coordinates: A[15; 0] B[0; 0] C[3.33333333333; 9.42880904158]
Centroid: CG[6.11111111111; 3.14326968053]
Coordinates of the circumscribed circle: U[7.5; 2.65216504294]
Coordinates of the inscribed circle: I[5; 3.53655339059]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.0587558731° = 141°3'27″ = 0.68796738189 rad
∠ B' = β' = 109.4711220634° = 109°28'16″ = 1.23109594173 rad
∠ C' = γ' = 109.4711220634° = 109°28'16″ = 1.23109594173 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.