# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 18   b = 19   c = 19

Area: T = 150.5998804776
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 56.54774272627° = 56°32'51″ = 0.98769387893 rad
Angle ∠ B = β = 61.72662863686° = 61°43'35″ = 1.07773269322 rad
Angle ∠ C = γ = 61.72662863686° = 61°43'35″ = 1.07773269322 rad

Height: ha = 16.73332005307
Height: hb = 15.85325057659
Height: hc = 15.85325057659

Median: ma = 16.73332005307
Median: mb = 15.88223801743
Median: mc = 15.88223801743

Inradius: r = 5.3798528742
Circumradius: R = 10.78769381992

Vertex coordinates: A[19; 0] B[0; 0] C[8.52663157895; 15.85325057659]
Centroid: CG[9.17554385965; 5.28441685886]
Coordinates of the circumscribed circle: U[9.5; 5.11096023049]
Coordinates of the inscribed circle: I[9; 5.3798528742]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 123.4532572737° = 123°27'9″ = 0.98769387893 rad
∠ B' = β' = 118.2743713631° = 118°16'25″ = 1.07773269322 rad
∠ C' = γ' = 118.2743713631° = 118°16'25″ = 1.07773269322 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.