109.5 degrees
The question is nonsense. WHICH bond angle? There are many of them in a molecule the size of estradiol.
The bond angle of BF2 is 120 degrees.
The value of the bond angle in XeF2 is 180 degrees.
90 degrees is the value of the smallest bond angle in IF4.
The bond length is equal to the linear distance between the nuclei of the bonding atoms. The bond angle is equal to the angle between any two consecutive bonds in a molecule or ion. Bond angles of molecules and ions are usually determined by using the VSEPR theory.
In the case of ammonia (NH3), the predicted bond angle based on idealized geometry is 109.5 degrees, but the actual bond angle is around 107 degrees due to the presence of lone pairs repelling the bonded pairs. In the case of water (H2O), the predicted bond angle based on idealized geometry is 104.5 degrees, but the actual bond angle is around 104 degrees due to the presence of lone pairs repelling the bonded pairs.
The bond angle of AlCl3 is 120 degrees.
The bond angle of N2O is 180 degrees.
The bond angle in CO2 is 180 degrees.
The bond angle for H2S is approximately 92 degrees.
The bond angle for NBr3 is approximately 107 degrees.
The bond angle for AsF3 is approximately 87.5 degrees.
The bond angle for IO2 is around 120 degrees.
The bond angle in NI3 is approximately 107 degrees.
The bond angle for OF2 is approximately 103 degrees.
The bond angle for SO2 is approximately 119 degrees.
The bond angle in NF3 is approximately 107 degrees.