7 28 28 triangle

Acute isosceles triangle.

Sides: a = 7   b = 28   c = 28

Area: T = 97.23113606816
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 14.36215115629° = 14°21'41″ = 0.25106556623 rad
Angle ∠ B = β = 82.81992442185° = 82°49'9″ = 1.44554684956 rad
Angle ∠ C = γ = 82.81992442185° = 82°49'9″ = 1.44554684956 rad

Height: ha = 27.78803887662
Height: hb = 6.94550971915
Height: hc = 6.94550971915

Median: ma = 27.78803887662
Median: mb = 14.84992424049
Median: mc = 14.84992424049

Inradius: r = 3.08767098629
Circumradius: R = 14.1110673659

Vertex coordinates: A[28; 0] B[0; 0] C[0.875; 6.94550971915]
Centroid: CG[9.625; 2.31550323972]
Coordinates of the circumscribed circle: U[14; 1.76438342074]
Coordinates of the inscribed circle: I[3.5; 3.08767098629]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.6388488437° = 165°38'19″ = 0.25106556623 rad
∠ B' = β' = 97.18107557815° = 97°10'51″ = 1.44554684956 rad
∠ C' = γ' = 97.18107557815° = 97°10'51″ = 1.44554684956 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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