# Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

### Right scalene triangle.

Sides: a = 12   b = 35   c = 37

Area: T = 210
Perimeter: p = 84
Semiperimeter: s = 42

Angle ∠ A = α = 18.92546444161° = 18°55'29″ = 0.33302973548 rad
Angle ∠ B = β = 71.07553555839° = 71°4'31″ = 1.2440498972 rad
Angle ∠ C = γ = 90° = 1.57107963268 rad

Height: ha = 35
Height: hb = 12
Height: hc = 11.35113513514

Median: ma = 35.51105618091
Median: mb = 21.21990951739
Median: mc = 18.5

Inradius: r = 5
Circumradius: R = 18.5

Vertex coordinates: A[37; 0] B[0; 0] C[3.89218918919; 11.35113513514]
Centroid: CG[13.63106306306; 3.78437837838]
Coordinates of the circumscribed circle: U[18.5; 0]
Coordinates of the inscribed circle: I[7; 5]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 161.0755355584° = 161°4'31″ = 0.33302973548 rad
∠ B' = β' = 108.9254644416° = 108°55'29″ = 1.2440498972 rad
∠ C' = γ' = 90° = 1.57107963268 rad

# How did we calculate this triangle?

### 1. Input data entered: side a, b and c. ### 2. The triangle circumference is the sum of the lengths of its three sides ### 3. Semiperimeter of the triangle ### 4. The triangle area using Heron's formula ### 5. Calculate the heights of the triangle from its area. ### 6. Calculation of the inner angles of the triangle using a Law of Cosines ### 7. Inradius ### 8. Circumradius ### 9. 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.