Test3 circle square

This document contains three math problems involving circles and geometry. The first problem involves drawing a circle with diameter AB and point M on the circle such that AM = 2.5 cm. It asks about the midpoint I of AM and the position of the symmetrical point J. The second problem asks about the radii of two externally disjoint, internally tangent, or externally tangent circles. The third problem involves an isosceles right triangle HEG, a circle with diameter EG, and the positions of symmetrical points F and U in relation to the circle.