7 30 30 triangle
Acute isosceles triangle.
Sides: a = 7 b = 30 c = 30Area: T = 104.2832968408
Perimeter: p = 67
Semiperimeter: s = 33.5
Angle ∠ A = α = 13.43995303555° = 13°23'58″ = 0.23438659229 rad
Angle ∠ B = β = 83.33002348222° = 83°18'1″ = 1.45438633653 rad
Angle ∠ C = γ = 83.33002348222° = 83°18'1″ = 1.45438633653 rad
Height: ha = 29.79551338309
Height: hb = 6.95221978939
Height: hc = 6.95221978939
Median: ma = 29.79551338309
Median: mb = 15.79655689989
Median: mc = 15.79655689989
Inradius: r = 3.11329244301
Circumradius: R = 15.10331373967
Vertex coordinates: A[30; 0] B[0; 0] C[0.81766666667; 6.95221978939]
Centroid: CG[10.27222222222; 2.3177399298]
Coordinates of the circumscribed circle: U[15; 1.76220326963]
Coordinates of the inscribed circle: I[3.5; 3.11329244301]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 166.6600469644° = 166°36'2″ = 0.23438659229 rad
∠ B' = β' = 96.76997651778° = 96°41'59″ = 1.45438633653 rad
∠ C' = γ' = 96.76997651778° = 96°41'59″ = 1.45438633653 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
