Showing posts with label Book II. Show all posts
Showing posts with label Book II. Show all posts

Sunday, February 15, 2009

Problem 249. Triangle sides, medians, squares

Proposed Problem
Triangle sides, medians, squares

See complete Problem 249 at:
gogeometry.com/problem/p249_triangle_sides_medians_squares.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Thursday, February 12, 2009

Euclid's Elements Book II, Proposition 13: Law of Cosines

Acute Triangle
 Euclid's Elements Book II, Proposition 13: Law of Cosines.

See complete illustration at:
gogeometry.com/geometry/euclid_elements_book_ii_proposition_13_cosines_law.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Euclid's Elements Book II, Proposition 12: Law of Cosines.

Obtuse Triangle
 Euclid's Elements Book II, Proposition 12: Law of Cosines.

See complete illustration at:
gogeometry.com/geometry/euclid_elements_book_ii_proposition_12_cosines_law.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.