5 16 16 triangle
Acute isosceles triangle.
Sides: a = 5 b = 16 c = 16Area: T = 39.50987015732
Perimeter: p = 37
Semiperimeter: s = 18.5
Angle ∠ A = α = 17.97985986903° = 17°58'43″ = 0.3143785742 rad
Angle ∠ B = β = 81.01107006548° = 81°39″ = 1.41439034558 rad
Angle ∠ C = γ = 81.01107006548° = 81°39″ = 1.41439034558 rad
Height: ha = 15.80334806293
Height: hb = 4.93985876966
Height: hc = 4.93985876966
Median: ma = 15.80334806293
Median: mb = 8.74664278423
Median: mc = 8.74664278423
Inradius: r = 2.13656054904
Circumradius: R = 8.09994815638
Vertex coordinates: A[16; 0] B[0; 0] C[0.781125; 4.93985876966]
Centroid: CG[5.594375; 1.64661958989]
Coordinates of the circumscribed circle: U[8; 1.26655439943]
Coordinates of the inscribed circle: I[2.5; 2.13656054904]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.021140131° = 162°1'17″ = 0.3143785742 rad
∠ B' = β' = 98.98992993452° = 98°59'21″ = 1.41439034558 rad
∠ C' = γ' = 98.98992993452° = 98°59'21″ = 1.41439034558 rad
Calculate another triangle
How did we calculate this triangle?
Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.
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
