# 11 14 14 triangle

### Acute isosceles triangle.

Sides: a = 11   b = 14   c = 14

Area: T = 70.80991625427
Perimeter: p = 39
Semiperimeter: s = 19.5

Angle ∠ A = α = 46.26547927986° = 46°15'53″ = 0.80774729621 rad
Angle ∠ B = β = 66.86876036007° = 66°52'3″ = 1.16770598458 rad
Angle ∠ C = γ = 66.86876036007° = 66°52'3″ = 1.16770598458 rad

Height: ha = 12.87443931896
Height: hb = 10.1165594649
Height: hc = 10.1165594649

Median: ma = 12.87443931896
Median: mb = 10.46442247682
Median: mc = 10.46442247682

Inradius: r = 3.63112391048
Circumradius: R = 7.61220092463

Vertex coordinates: A[14; 0] B[0; 0] C[4.32114285714; 10.1165594649]
Centroid: CG[6.10771428571; 3.3721864883]
Coordinates of the circumscribed circle: U[7; 2.99904322039]
Coordinates of the inscribed circle: I[5.5; 3.63112391048]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.7355207201° = 133°44'7″ = 0.80774729621 rad
∠ B' = β' = 113.1322396399° = 113°7'57″ = 1.16770598458 rad
∠ C' = γ' = 113.1322396399° = 113°7'57″ = 1.16770598458 rad

# 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. ### 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.