Geometry Problems, Online Education

Problem 101. Equilateral Triangle, Pythagoras, Angles. High School, College

In the diagram below, given an equilateral triangle ABC, D is an interior point. If a2 = b2 +c2 prove that the measure of angle BDC is equal to 150. View or post a solution.
.

Equilateral triangle, Pythagoras. Elearning


HINTS:

  • Pythagorean Theorem Converse

  • Congruence of Triangles SAS

  • The sum of the measures of the three angles of a triangle is 180.


 

Circle area, Elearning
 

 

Home | Geometry | Search | Problems | Congruence | Right Triangle | All Problems | 101-110 | Visual Index | Email | View or post a solution | by Antonio Gutierrez