# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 6   b = 15   c = 15

Area: T = 44.09108153701
Perimeter: p = 36
Semiperimeter: s = 18

Angle ∠ A = α = 23.07439180656° = 23°4'26″ = 0.40327158416 rad
Angle ∠ B = β = 78.46330409672° = 78°27'47″ = 1.3699438406 rad
Angle ∠ C = γ = 78.46330409672° = 78°27'47″ = 1.3699438406 rad

Height: ha = 14.69769384567
Height: hb = 5.87987753827
Height: hc = 5.87987753827

Median: ma = 14.69769384567
Median: mb = 8.61768439698
Median: mc = 8.61768439698

Inradius: r = 2.44994897428
Circumradius: R = 7.65546554462

Vertex coordinates: A[15; 0] B[0; 0] C[1.2; 5.87987753827]
Centroid: CG[5.4; 1.96595917942]
Coordinates of the circumscribed circle: U[7.5; 1.53109310892]
Coordinates of the inscribed circle: I[3; 2.44994897428]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.9266081934° = 156°55'34″ = 0.40327158416 rad
∠ B' = β' = 101.5376959033° = 101°32'13″ = 1.3699438406 rad
∠ C' = γ' = 101.5376959033° = 101°32'13″ = 1.3699438406 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.