# Triangle calculator SSS - result

Please enter the triangle sides:

### Equilateral triangle.

Sides: a = 7   b = 7   c = 7

Area: T = 21.21876223927
Perimeter: p = 21
Semiperimeter: s = 10.5

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

Height: ha = 6.06221778265
Height: hb = 6.06221778265
Height: hc = 6.06221778265

Median: ma = 6.06221778265
Median: mb = 6.06221778265
Median: mc = 6.06221778265

Inradius: r = 2.02107259422
Circumradius: R = 4.04114518843

Vertex coordinates: A[7; 0] B[0; 0] C[3.5; 6.06221778265]
Centroid: CG[3.5; 2.02107259422]
Coordinates of the circumscribed circle: U[3.5; 2.02107259422]
Coordinates of the inscribed circle: I[3.5; 2.02107259422]

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. 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.