Geometry Problem 1513: Solving the base in a Right Trapezoid with Double Angle and Sum of Two Sides. Difficulty Level: High School.

Geometry Problem 1513. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Geometry Problem 1511: Finding the Altitude of an Isosceles Triangle Using Distances from a Point on the Extension of the Base. Difficulty Level: High School.

Geometry Problem 1511. Post your solution in the comment box below.
Level: Mathematics Education, K-12 School, Honors Geometry, College.

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Poster of Geometry Problem 70: Squares Inscribed in a Triangle, Base, Altitude, iPad Apps

Geometric Art: Poster, Typography, iPad

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Geometry Problem 994: Trapezoid, Midpoints of the bases, Concurrent Lines

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

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Problem 747: Trapezoid, Diagonals, Parallel, Bases, Midpoint, Similarity, Harmonic Mean

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

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Trapezoid, diagonal, midpoints

Proposition
Given a triangle ABC and a trapezoid ADEC (DE // AC), as shown. AE and CD meet at F, and BF meets DE and AC at N and M respectively. Prove that M and N are the midpoints of AC and DE respectively.



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Trapezoid, Triangle, Diagonals, Midpoints. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.
Prove proposition.. Level: High School, SAT Prep, College geometry

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