# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 28.28   b = 28.28   c = 40

Area: T = 399.8799181754
Perimeter: p = 96.56
Semiperimeter: s = 48.28

Angle ∠ A = α = 44.99113457236° = 44°59'29″ = 0.78552471178 rad
Angle ∠ B = β = 44.99113457236° = 44°59'29″ = 0.78552471178 rad
Angle ∠ C = γ = 90.01773085529° = 90°1'2″ = 1.5711098418 rad

Height: ha = 28.28799987096
Height: hb = 28.28799987096
Height: hc = 19.99439590877

Median: ma = 31.62218215794
Median: mb = 31.62218215794
Median: mc = 19.99439590877

Inradius: r = 8.28325016933
Circumradius: R = 200.0000009126

Vertex coordinates: A[40; 0] B[0; 0] C[20; 19.99439590877]
Centroid: CG[20; 6.66546530292]
Coordinates of the circumscribed circle: U[20; -0.00660418249]
Coordinates of the inscribed circle: I[20; 8.28325016933]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 135.0098654276° = 135°31″ = 0.78552471178 rad
∠ B' = β' = 135.0098654276° = 135°31″ = 0.78552471178 rad
∠ C' = γ' = 89.98326914471° = 89°58'58″ = 1.5711098418 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.