# 7.88 9.41 11.47 triangle

### Acute scalene triangle.

Sides: a = 7.88   b = 9.41   c = 11.47

Area: T = 36.76772213935
Perimeter: p = 28.76
Semiperimeter: s = 14.38

Angle ∠ A = α = 42.94552366699° = 42°56'43″ = 0.75495357779 rad
Angle ∠ B = β = 54.44773638692° = 54°26'50″ = 0.95502857685 rad
Angle ∠ C = γ = 82.60773994609° = 82°36'27″ = 1.44217711071 rad

Height: ha = 9.33217820796
Height: hb = 7.81444997648
Height: hc = 6.41110237827

Median: ma = 9.72327002422
Median: mb = 8.64223738058
Median: mc = 6.51439101161

Vertex coordinates: A[11.47; 0] B[0; 0] C[4.58218308631; 6.41110237827]
Centroid: CG[5.35106102877; 2.13770079276]
Coordinates of the circumscribed circle: U[5.735; 0.74440933245]
Coordinates of the inscribed circle: I[4.97; 2.55768304168]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 137.055476333° = 137°3'17″ = 0.75495357779 rad
∠ B' = β' = 125.5532636131° = 125°33'10″ = 0.95502857685 rad
∠ C' = γ' = 97.39326005391° = 97°23'33″ = 1.44217711071 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    