Go Geometry Problems

Geometry Problem 9 with Solution: Triangle, Angles, Congruence, 30 Degrees, Auxiliary Lines. High School, College, Math Education

< PREVIOUS PROBLEM  |  NEXT PROBLEM >

In the figure below, AB = BD = AD, angle ACD = 10º, angle CAD = x and angle CBD = x + 30º. Find x. Try to use elementary geometry (Euclid's Elements.)

 

Proposed Geometry Problem 09, Triangle, Angles
 

See solution below

See also:
Sketch problem 9, art 01
Sketch problem 9, art 02
Original problem art 9

 

Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 10 Problems | Art | 1-10 | Key theoremsEmail | 1-100 | by Antonio Gutierrez

View or Post a solution
Last updated: Sep 19, 2014


Geometry Problem 9 Solution(s)