If the two right angles of a right triangle are 3 and 4, then the radius r of its circumcircle=______ , inscribed circle radius r=______ .

If the two right angles of a right triangle are 3 and 4, then the radius r of its circumcircle=______ , inscribed circle radius r=______ .

If the lengths of the two right angles of a right triangle are 3 and 4, then its hypotenuse is 5, so its circumcircle radius r = 12 × 5 = 2.5, and its inscribed circle radius r = 3 + 4 − 52 = 1