Proposed Problem 441.
Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.

Proposed Problem 442.
Triangle, Median, Cevian, Transversal, Congruent Angles.

Proposed Problem 443.
Overlapping, Intersecting Circles, Common Chord, Secant line, Tangent line, Angles.

Proposed Problem 444.
Internally Tangent circles, Secant line, Chords, Angles, Congruence.

Proposed Problem 445.
Three Tangent Circles, Tangency Points, Circumradius.

Proposed Problem 446.
Quadrilateral Area, Dividing the sides into 5 equal parts.

Proposed Problem 447.
Complete Quadrilateral, Inradii, Exradii, Sides.

Proposed Problem 448.
Tangent Circles, Diameter, Perpendicular, Chord.

Proposed Problem 449.
Congruent Tangent Circles, Diameter, Sagitta, Arc, Perpendicular, Chord.

Proposed Problem 450.
Triangle, Median, Cevian, Congruence, Proportional Segments.