Right-angled triangle divided to two triangles with equal inradii
Let ABC is the triangle with right angle at vertex C.
Construct the point D on hypotenuse AB such that
two triangles,
BDC and DAC have the equal inradii.
Construction:
Let the side CB is less than side CA.
-
Take two points on side CA: F and E, such that:
CF = min{CA/2, CB}, and CE = max{CA/2, CB}
- Find the point O, the midpoint of CE
- Draw the circle with center at point O and radius CO = OE
- From point F draw perpendicular to side CA
- Find point H of intersection of line in p. 4 and circle in p. 3
- Draw the circle with center at vertex C and radius CH
- Find the point D of intersection of circle in p. 6 with the hypotenuse BA.
The segment CD divides the triangle ABC into two triangles,
BDC and DAC
with incircles of equal radii.