# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 17   b = 17   c = 28

Area: T = 135.0111110654
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 34.566032178° = 34°33'37″ = 0.60331914056 rad
Angle ∠ B = β = 34.566032178° = 34°33'37″ = 0.60331914056 rad
Angle ∠ C = γ = 110.879935644° = 110°52'46″ = 1.93552098424 rad

Height: ha = 15.88436600769
Height: hb = 15.88436600769
Height: hc = 9.6443650761

Median: ma = 21.54664614264
Median: mb = 21.54664614264
Median: mc = 9.6443650761

Inradius: r = 4.35551971179
Circumradius: R = 14.98439519889

Vertex coordinates: A[28; 0] B[0; 0] C[14; 9.6443650761]
Centroid: CG[14; 3.21545502537]
Coordinates of the circumscribed circle: U[14; -5.34403012279]
Coordinates of the inscribed circle: I[14; 4.35551971179]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.443967822° = 145°26'23″ = 0.60331914056 rad
∠ B' = β' = 145.443967822° = 145°26'23″ = 0.60331914056 rad
∠ C' = γ' = 69.121064356° = 69°7'14″ = 1.93552098424 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.