# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 15   b = 24   c = 26

Area: T = 177.2676571863
Perimeter: p = 65
Semiperimeter: s = 32.5

Angle ∠ A = α = 34.62221618397° = 34°37'20″ = 0.60442707183 rad
Angle ∠ B = β = 65.37656816478° = 65°22'32″ = 1.14110208955 rad
Angle ∠ C = γ = 80.00221565124° = 80°8″ = 1.39663010398 rad

Height: ha = 23.6365542915
Height: hb = 14.77222143219
Height: hc = 13.63658901433

Median: ma = 23.86994365246
Median: mb = 17.50771414
Median: mc = 15.21551240547

Inradius: r = 5.45443560573
Circumradius: R = 13.22004583572

Vertex coordinates: A[26; 0] B[0; 0] C[6.25; 13.63658901433]
Centroid: CG[10.75; 4.54552967144]
Coordinates of the circumscribed circle: U[13; 2.29217462426]
Coordinates of the inscribed circle: I[8.5; 5.45443560573]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.378783816° = 145°22'40″ = 0.60442707183 rad
∠ B' = β' = 114.6244318352° = 114°37'28″ = 1.14110208955 rad
∠ C' = γ' = 99.99878434876° = 99°59'52″ = 1.39663010398 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    