11 28 28 triangle

Acute isosceles triangle.

Sides: a = 11   b = 28   c = 28

Area: T = 1510.999793046
Perimeter: p = 67
Semiperimeter: s = 33.5

Angle ∠ A = α = 22.65663777041° = 22°39'23″ = 0.39554283875 rad
Angle ∠ B = β = 78.67218111479° = 78°40'19″ = 1.3733082133 rad
Angle ∠ C = γ = 78.67218111479° = 78°40'19″ = 1.3733082133 rad

Height: ha = 27.45545078266
Height: hb = 10.78656995033
Height: hc = 10.78656995033

Median: ma = 27.45545078266
Median: mb = 16.0165617378
Median: mc = 16.0165617378

Inradius: r = 4.50774565088
Circumradius: R = 14.27881652644

Vertex coordinates: A[28; 0] B[0; 0] C[2.16107142857; 10.78656995033]
Centroid: CG[10.05435714286; 3.59552331678]
Coordinates of the circumscribed circle: U[14; 2.80546396055]
Coordinates of the inscribed circle: I[5.5; 4.50774565088]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 157.3443622296° = 157°20'37″ = 0.39554283875 rad
∠ B' = β' = 101.3288188852° = 101°19'41″ = 1.3733082133 rad
∠ C' = γ' = 101.3288188852° = 101°19'41″ = 1.3733082133 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.


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