Geometry Problems, Online Education

Problem 526: Equilateral Triangle, Chord, Measurement. Level: High School, SAT Prep, College Geometry

The figure shows an equilateral triangle ABC inscribed in a circle. A chord AD meets BC at E. If DE = d, DB = e, and
DC = f. Prove that Formula to prove. Post a comment or solution.
 

Equilateral triangle and circumcircle
 

 

 

See Also:

 

Geometry Problems 71-80

 

Circle, Tangent, Secant, Midpoint

Problem 527.
Circle, Tangent, Secant, Chord, Midpoint, Measurement.

 

Circle, Tangent, Diameter, Radius, Congruence

Problem 525.
Circles, Diameter, Tangent, Radius, Congruence, Measurement.

 

Circle with equilateral triangles

Problem 524.
Circle, Equilateral Triangles, Midpoint, Side, Measurement.

 

Tangent Circles

Problem 523.
Tangent Circles, Diameter Perpendicular, Collinearity.

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