Geometry Problem 1587: Uncover the Elegance of Triangle BGH's Area in Trapezoid ABCD.

Challenging Geometry Puzzle: Problem 1587. Share your solution by posting it in the comment box provided.
Audience: Mathematics Education - K-12 Schools, Honors Geometry, and College Level.

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Problem-Solving Challenge 1583: Prove Lines CK and BL are Parallel

Challenging Geometry Puzzle: Problem 1583. Share your solution by posting it in the comment box provided.
Audience: Mathematics Education - K-12 Schools, Honors Geometry, and College Level.

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Geometry Problem 1561: Triangle ABC, Circumcenter O, and Orthocenter H

Challenging Geometry Puzzle: Problem 1561. Share your solution by posting it in the comment box provided.
Audience: Mathematics Education - K-12 Schools, Honors Geometry, and College Level.

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Geometry Problem 1560: Trapezoid ABCD

Challenging Geometry Puzzle: Problem 1560. Share your solution by posting it in the comment box provided.
Audience: Mathematics Education - K-12 Schools, Honors Geometry, and College Level.

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Geometry Problem 1555: Find Length of DE

Challenging Geometry Puzzle: Problem 1555. Share your solution by posting it in the comment box provided.
Audience: Mathematics Education - K-12 Schools, Honors Geometry, and College Level.

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Geometry Problem 1524: Unlock the Mystery of Parallelograms: Discover the Length of Segment between the Intersecting Angle Bisectors. Difficulty Level: High School.

Geometry Problem 1524. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1523: Discover How to Calculate the Length of the Altitude in an Isosceles Triangle

Geometry Problem 1523. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1522: Unlocking the Angle Measure of a Triangle with Median and Doubled Side Lengths. Difficulty Level: High School.

Geometry Problem 1522. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1519: Discover the Length of a Segment in a Parallelogram using Midpoints and Parallel Lines. Difficulty Level: High School.

Geometry Problem 1519. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1506: Parallel Rays, Angles. Difficulty Level: High School

Geometry Problem 1506. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1505: Parallel Rays, Angles, and Bisector. Difficulty Level: High School.

Geometry Problem 1505. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1504: Squares, Equilateral Triangle, Parallel, Angle

Geometry Problem 1504. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1501: Square, Exterior Point, Congruent Angles, Segment, Measurement

Geometry Problem 1501. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1500: Circle, Perpendicular, Tangent, Secant, Cyclic Quadrilateral, Parallel, Similarity, Measurement

Geometry Problem 1500. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1495: Circle, Parallel Chords, 30 Degree Angle, Radius Squared

Geometry Problem 1495. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1493: Four Squares, Parallelogram, Auxiliary Lines

Geometry Problem 1493. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Dynamic Geometry 1479: Triangle, Circumcircle, Angle Bisector, Perpendicular Bisector, Chord, Concyclic Points, Parallel Lines, Step-by-step Illustration

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Problem 1470: Tangential Quadrilateral, Incircles, Tangent, Parallel, Rhombus

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Problem 1456: Altitudes, Orthic Triangle, Circumcircle, Parallel, Similarity, Area

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Problem 1441 Intersecting Circles, Perpendicular Bisector, Parallel Lines

Geometry Problem. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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