# 1 22 22 triangle

### Acute isosceles triangle.

Sides: a = 1   b = 22   c = 22

Area: T = 10.9977158724
Perimeter: p = 45
Semiperimeter: s = 22.5

Angle ∠ A = α = 2.60545778704° = 2°36'16″ = 0.04554584595 rad
Angle ∠ B = β = 88.69877110648° = 88°41'52″ = 1.54880670971 rad
Angle ∠ C = γ = 88.69877110648° = 88°41'52″ = 1.54880670971 rad

Height: ha = 21.99443174479
Height: hb = 10.9997417022
Height: hc = 10.9997417022

Median: ma = 21.99443174479
Median: mb = 11.02327038425
Median: mc = 11.02327038425

Inradius: r = 0.489876261
Circumradius: R = 11.00328420101

Vertex coordinates: A[22; 0] B[0; 0] C[0.02327272727; 10.9997417022]
Centroid: CG[7.34109090909; 0.33332472341]
Coordinates of the circumscribed circle: U[11; 0.25500645911]
Coordinates of the inscribed circle: I[0.5; 0.489876261]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 177.395542213° = 177°23'44″ = 0.04554584595 rad
∠ B' = β' = 91.30222889352° = 91°18'8″ = 1.54880670971 rad
∠ C' = γ' = 91.30222889352° = 91°18'8″ = 1.54880670971 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.