Mathematics
BEC is an equilateral triangle inside the square ABCD. The value of angle ECD is :
60°
30°
75°
45°
Related Questions
If three angles of a quadrilateral are equal, then the quadrilateral is :
rectangle
rhombus
not a parallelogram
parallelogram
The diagonal BD of a parallelogram ABCD bisects angles B and D. Prove that ABCD is a rhombus.
If three angles of a quadrilateral are equal to 90° each, then the quadrilateral is :
rectangle
square
parallelogram
rhombus
E is the mid-point of side AB and F is the mid point of side DC of parallelogram ABCD. Prove that AEFD is a parallelogram.