Geometry Problems 121 - 130

Problem 121.
Similarity and Area of triangle, Trisection of Sides.

Problem 122.
Marion Walter's Theorem. Area of triangle and Hexagon, Trisection of Sides.

Problem 123.
Area of triangle, Similarity, Trisection of Sides.

Problem 124.
Area of triangle, Similarity, Trisection of Sides.

Problem 125.
Area of Triangle, Star, Trisection of Sides.

Problem 126.
Incenter of a Triangle, Angle Bisector, Proportions.

Problem 127.
Centroid and Incenter of a Triangle, Parallel, Proportions.

Problem 128.
Incenter of a Triangle, Angle Bisectors, Sum of Ratios.

Problem 129.
Triangle, Concurrent Cevians, Sum of Ratios.

Problem 130.
Triangle, Concurrent Cevians, Sum of Ratios.