Showing posts with label hypotenuse. Show all posts
Showing posts with label hypotenuse. Show all posts

Saturday, July 11, 2026

Geometric Challenge

Problem 1619: Right Triangle Area in terms of Inradius and Hypotenuse

Share your proof or solution in the comments below.
Target Audience: K-12, Honors Geometry, and College Mathematics Education.

Discover an elegant identity connecting the fundamental metrics of a right triangle. In Problem 1619, we explore how the area relates directly to its inradius and hypotenuse: Area = r(r + c).
Click the image below to view the full problem statement and diagram.

Geometry Problem 1619: Right Triangle Area, Inradius, and Hypotenuse
Click for additional details and full diagram.

Proposed Solution
We invite students, teachers, and math enthusiasts to share their proof. Try using geometric area decomposition or metric properties of tangents.

How to contribute:
Post your step-by-step proof in the comments below. Feel free to:
  • Describe the geometric theorems applied.
  • Share a link to your visual construction (GeoGebra, Desmos).
Be the first to submit a formal solution for this challenge!
Ready to contribute?
Please use the box below to Enter your Comment or Solution.

Saturday, February 8, 2014

Geometry Problem 976: Isosceles Right Triangle, 45 Degrees, Incenter, Angle Bisector, Hypotenuse

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

Click the figure below to see the complete problem 976.

Online Geometry Problem 976: Isosceles Right Triangle, 45 Degrees, Incenter, Angle Bisector, Hypotenuse

Friday, February 7, 2014

Geometry Problem 975: Isosceles Right Triangle, 45 Degrees, Angle Bisector, Hypotenuse

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

Click the figure below to see the complete problem 975.

Online Geometry Problem 975: Isosceles Right Triangle, 45 Degrees, Angle Bisector, Hypotenuse

Monday, July 23, 2012

Right Triangle, Altitude to the Hypotenuse, Incircle, Incenter, Inradius, Angle Bisector, Theorems and Problems, Index

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

Click the figure below to see the index.

Online Geometry: Right Triangle, Altitude to the Hypotenuse, Incircle, Incenter, Inradius, Angle Bisector, Theorems and Problems, Index.

Wednesday, July 18, 2012

Problem 786: Right Triangle, Altitude, Hypotenuse, Cevian, Perpendicular, Ratio, Metric relations

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

Click the figure below to see the complete problem 786.

Online Geometry Problem 786: Right Triangle, Altitude, Hypotenuse, Cevian, Perpendicular, Ratio, Metric relations.

Thursday, June 9, 2011

Problem 617: Right Triangle Area, Incircle, Incenter, Tangent, 90 Degrees

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

Click the figure below to see the complete problem 617.

Problem 617: Right Triangle Area, Incircle, Incenter, Tangent, 90 Degrees

Friday, February 4, 2011

Thursday, November 11, 2010

Geometry Problems 261-270: Regular Polygon, Pentagon, Hexagon, Circle, Tangent, Similarity, Triangle, Hypotenuse, Catheti, Geometric Mean, Altitude,

Ten Geometry Problems
Click the figure below to see problems 261-270 about Regular Polygon, Pentagon, Hexagon, Circle, Distance, Triangle, Hypotenuse, Catheti, Similarity, Geometric Mean, Altitude, Perpendicular, Projection, Tangent, Fractional Exponent, Common External Tangent.


Level: High School, SAT Prep, College geometry

Sunday, September 12, 2010

Geometry Problems 201-210: Right Triangle, Incircle, Excircle, Area, Radius

Ten Geometry Problems
Click the figure below to see problems 201-210 about Right Triangle, Incircle, Excircle, Area, Points of Tangency, Inradius, Exradius, Semiperimeter, Hypotenuse, 360 Degrees, Angle.

Geometry Problems 201 - 210


See also:
Problems 201-210

Level: High School, SAT Prep, College geometry

Saturday, August 28, 2010

Geometry Problems: 181-190 Triangle, Trapezoid, Square, Circles, 90 Degrees, Hypotenuse

Ten Geometry Problems
Click the figure below to see problems 181-190 about Right Triangle, Trapezoid, Square, Intersecting Circles, Circular Sector, 90 Degrees, Angles, Trisection, Hypotenuse, Distance, Incenter, Altitude, Diagonal, 45 Degrees, Tangent, Chord, Perpendicular.

Geometry Problems 181 - 190


See also:
Problems 181-190

Level: High School, SAT Prep, College geometry

Saturday, August 22, 2009

Trigonometry, Interactive Mind Map

Graphic organizers are visual representations of knowledge, concepts or ideas.
Click the figure below to see the Interactive Mind Map of Trigonometry.

 Interactive Mind Map of Trigonometry.
See also:
Interactive Mind Map of Trigonometry

Tuesday, April 7, 2009

Problem 23: Right triangle, Altitude, Inradius

Proposed Problem

Problem 23: Right triangle, Altitude, Inradius.

See complete Problem 23 at:
gogeometry.com/problem/p023_right_triangle_incircles.htm

Level: High School, SAT Prep, College geometry

Thursday, March 12, 2009

Problem 268: Right Triangle, Catheti and Altitude

Proposed Problem
Problem 268. Right Triangle, Catheti and Altitude.

See complete Problem 268 at:
gogeometry.com/problem/p268_right_triangle_catheti_altitude_hypotenuse_square.htm

Level: High School, SAT Prep, College geometry

Problem 267: Right Triangle, Product of Catheti

Proposed Problem
Problem 267. Right Triangle, Product of Catheti.

See complete Problem 267 at:
gogeometry.com/problem/p267_right_triangle_catheti_product.htm

Level: High School, SAT Prep, College geometry

Problem 266: Right Triangle, Altitude, Geometric Mean

Proposed Problem
Problem 266. Right Triangle, Altitude, Geometric Mean.

See complete Problem 266 at:
gogeometry.com/problem/p266_right_triangle_altitude_geometric_mean.htm

Level: High School, SAT Prep, College geometry

Saturday, November 15, 2008

Elearn Geometry Problem 207: Right Triangle, Inradius, Exradius, Hypotenuse

Right triangle

See complete Problem 207 at:
gogeometry.com/problem/p207_right_triangle_hypotenuse.htm

Right Triangle, Hypotenuse, Inradius, Exradius relative to the hypotenuse. Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Elearn Geometry Problem 206: Area of a Right Triangle, Inradius, Exradius

Right triangle

See complete Problem 206 at:
gogeometry.com/problem/p206_right_triangle_area_inradius.htm

Area of a Right Triangle Area, Inradius, Exradius relative to the hypotenuse. Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Monday, November 10, 2008

Elearn Geometry Problem 203: Right Triangle, Hypotenuse,Excircles

Right triangle

See complete Problem 203 at:
gogeometry.com/problem/p203_right_triangle_excircles_hypotenuse.htm

Right Triangle, Excircles, Exradii, Hypotenuse. Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Tuesday, September 23, 2008

Elearn Geometry Problem 183

Right triangle

See complete Problem 183 at:
www.gogeometry.com/problem/p183_right_triangle_hypotenuse.htm

Right Triangle, Hypotenuse Trisection Points, Squares of the Distances. Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.