Triangle calculator SSS - result

Acute isosceles triangle.

Sides: a = 910   b = 910   c = 142.8

Area: T = 64773.69443507
Perimeter: p = 1962.8
Semiperimeter: s = 981.4

Angle ∠ A = α = 85.54998596089° = 85°29'59″ = 1.49222540602 rad
Angle ∠ B = β = 85.54998596089° = 85°29'59″ = 1.49222540602 rad
Angle ∠ C = γ = 99.0002807823° = 9°1″ = 0.15770845333 rad

Height: ha = 142.3659767804
Height: hb = 142.3659767804
Height: hc = 907.1954598749

Median: ma = 466.0769651447
Median: mb = 466.0769651447
Median: mc = 907.1954598749

Vertex coordinates: A[142.8; 0] B[0; 0] C[71.4; 907.1954598749]
Centroid: CG[71.4; 302.3988199583]
Coordinates of the circumscribed circle: U[71.4; 450.7887560424]
Coordinates of the inscribed circle: I[71.4; 66.00113188819]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 94.55001403911° = 94°30'1″ = 1.49222540602 rad
∠ B' = β' = 94.55001403911° = 94°30'1″ = 1.49222540602 rad
∠ C' = γ' = 1710.999719218° = 170°59'59″ = 0.15770845333 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    