ABCD is a square and ABE is an equilateral triangle outside the square then find angle BEC - Maths - Quadrilaterals

Question

ABCD is a square and ABE is an equilateral triangle outside the
square then find angle BEC?

Anuradha Sharma · Accepted Answer

Since ABCD is a square abd ABE an equilateral triangle so
AB=BE=AE=BC=CD=ADSo in triangle BCE, ∠BCE=∠BEC Since
BE=BCSo using angle sum property in triangle
BEC,x+x+90+60=1802x=30x=15 degreeSo angle BEC is 15 degree

ABCD is a square and ABE is an equilateral triangle outside the square then find angle BEC?