Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Tuesday, December 10, 2019

### Dynamic Geometry 1452: Japanese Theorem, Sangaku

## Saturday, December 7, 2019

### Dynamic Geometry 1451: Orthopole of a Line

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Saturday, November 30, 2019

### Dynamic Geometry 1450: Ortholine, Steiner Line

Interactive step-by-step animation using GeoGebra. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Wednesday, November 27, 2019

### Dynamic Geometry 1449: Salmon Line

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Tuesday, November 26, 2019

### Dynamic Geometry 1448: Simson Line

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Sunday, November 17, 2019

### Dynamic Geometry Problem 1447: Outer Vecten Point

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Wednesday, November 13, 2019

### Dynamic Geometry Problem 1446: The Lemoine Line

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Friday, November 8, 2019

### Dynamic Geometry Problem 1445: Van Aubel's theorem, Quadrilateral and Four Squares, Centers

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Wednesday, November 6, 2019

### Dynamic Geometry Problem 1444: The Asymmetric Propeller Theorem, Equilateral Triangles

Geometry Problem, GeoGebra. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.

## Monday, August 5, 2019

### Geometry Problem 1443: Triangle Area, Incenter, Circumcenter, 90 Degree, Perpendicular, One-third, Measurement

Geometry Problem. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

Details: Click on the figure below.