# 2 25 25 triangle

### Acute isosceles triangle.

Sides: a = 2   b = 25   c = 25

Area: T = 24.98799919936
Perimeter: p = 52
Semiperimeter: s = 26

Angle ∠ A = α = 4.58548855519° = 4°35'6″ = 0.08800213487 rad
Angle ∠ B = β = 87.7087557224° = 87°42'27″ = 1.53107856524 rad
Angle ∠ C = γ = 87.7087557224° = 87°42'27″ = 1.53107856524 rad

Height: ha = 24.98799919936
Height: hb = 1.99883993595
Height: hc = 1.99883993595

Median: ma = 24.98799919936
Median: mb = 12.58797456254
Median: mc = 12.58797456254

Inradius: r = 0.96107689228
Circumradius: R = 12.5110012016

Vertex coordinates: A[25; 0] B[0; 0] C[0.08; 1.99883993595]
Centroid: CG[8.36; 0.66661331198]
Coordinates of the circumscribed circle: U[12.5; 0.55004004806]
Coordinates of the inscribed circle: I[1; 0.96107689228]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 175.4155114448° = 175°24'54″ = 0.08800213487 rad
∠ B' = β' = 92.2922442776° = 92°17'33″ = 1.53107856524 rad
∠ C' = γ' = 92.2922442776° = 92°17'33″ = 1.53107856524 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.