22 28 28 triangle
Acute isosceles triangle.
Sides: a = 22 b = 28 c = 28Area: T = 283.2376650171
Perimeter: p = 78
Semiperimeter: s = 39
Angle ∠ A = α = 46.26547927986° = 46°15'53″ = 0.80774729621 rad
Angle ∠ B = β = 66.86876036007° = 66°52'3″ = 1.16770598458 rad
Angle ∠ C = γ = 66.86876036007° = 66°52'3″ = 1.16770598458 rad
Height: ha = 25.74987863792
Height: hb = 20.23111892979
Height: hc = 20.23111892979
Median: ma = 25.74987863792
Median: mb = 20.92884495365
Median: mc = 20.92884495365
Inradius: r = 7.26224782095
Circumradius: R = 15.22440184927
Vertex coordinates: A[28; 0] B[0; 0] C[8.64328571429; 20.23111892979]
Centroid: CG[12.21442857143; 6.7443729766]
Coordinates of the circumscribed circle: U[14; 5.98108644078]
Coordinates of the inscribed circle: I[11; 7.26224782095]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.7355207201° = 133°44'7″ = 0.80774729621 rad
∠ B' = β' = 113.1322396399° = 113°7'57″ = 1.16770598458 rad
∠ C' = γ' = 113.1322396399° = 113°7'57″ = 1.16770598458 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
