# Triangle calculator

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

### Equilateral triangle.

Sides: a = 58   b = 58   c = 58

Area: T = 1456.655472917
Perimeter: p = 174
Semiperimeter: s = 87

Angle ∠ A = α = 60° = 1.04771975512 rad
Angle ∠ B = β = 60° = 1.04771975512 rad
Angle ∠ C = γ = 60° = 1.04771975512 rad

Height: ha = 50.22994734195
Height: hb = 50.22994734195
Height: hc = 50.22994734195

Median: ma = 50.22994734195
Median: mb = 50.22994734195
Median: mc = 50.22994734195

Inradius: r = 16.74331578065
Circumradius: R = 33.4866315613

Vertex coordinates: A[58; 0] B[0; 0] C[29; 50.22994734195]
Centroid: CG[29; 16.74331578065]
Coordinates of the circumscribed circle: U[29; 16.74331578065]
Coordinates of the inscribed circle: I[29; 16.74331578065]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 120° = 1.04771975512 rad
∠ B' = β' = 120° = 1.04771975512 rad
∠ C' = γ' = 120° = 1.04771975512 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.