4 11 13 triangle

Obtuse scalene triangle.

Sides: a = 4   b = 11   c = 13

Area: T = 20.49439015319
Perimeter: p = 28
Semiperimeter: s = 14

Angle ∠ A = α = 16.65661861814° = 16°39'22″ = 0.29107052897 rad
Angle ∠ B = β = 52.02201275551° = 52°1'12″ = 0.90879225031 rad
Angle ∠ C = γ = 111.3243686263° = 111°19'25″ = 1.94329648608 rad

Height: ha = 10.2476950766
Height: hb = 3.72661639149
Height: hc = 3.1532907928

Median: ma = 11.8744342087
Median: mb = 7.8989866919
Median: mc = 5.1233475383

Inradius: r = 1.46438501094
Circumradius: R = 6.97876855216

Vertex coordinates: A[13; 0] B[0; 0] C[2.46215384615; 3.1532907928]
Centroid: CG[5.15438461538; 1.05109693093]
Coordinates of the circumscribed circle: U[6.5; -2.53773401897]
Coordinates of the inscribed circle: I[3; 1.46438501094]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 163.3443813819° = 163°20'38″ = 0.29107052897 rad
∠ B' = β' = 127.9879872445° = 127°58'48″ = 0.90879225031 rad
∠ C' = γ' = 68.67663137365° = 68°40'35″ = 1.94329648608 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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