# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 25   b = 28   c = 28

Area: T = 313.1876745409
Perimeter: p = 81
Semiperimeter: s = 40.5

Angle ∠ A = α = 53.03295492685° = 53°1'46″ = 0.92655402356 rad
Angle ∠ B = β = 63.48552253657° = 63°29'7″ = 1.1088026209 rad
Angle ∠ C = γ = 63.48552253657° = 63°29'7″ = 1.1088026209 rad

Height: ha = 25.05549396327
Height: hb = 22.37704818149
Height: hc = 22.37704818149

Median: ma = 25.05549396327
Median: mb = 22.55499445676
Median: mc = 22.55499445676

Inradius: r = 7.73330060595
Circumradius: R = 15.6465617421

Vertex coordinates: A[28; 0] B[0; 0] C[11.16107142857; 22.37704818149]
Centroid: CG[13.05435714286; 7.45768272716]
Coordinates of the circumscribed circle: U[14; 6.98546506344]
Coordinates of the inscribed circle: I[12.5; 7.73330060595]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.9770450731° = 126°58'14″ = 0.92655402356 rad
∠ B' = β' = 116.5154774634° = 116°30'53″ = 1.1088026209 rad
∠ C' = γ' = 116.5154774634° = 116°30'53″ = 1.1088026209 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.