The bond angles are 120 degrees
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120 degrees
A trigonal planar molecule such as sulfur trioxide (SO3) or boron trihydride (BH3) has a trigonal planar shape. Trigonal pyramidal molecules such as ammonia (NH3) have bond angle closer to 107 degrees.
Trigonal Planar (120 degrees)
CH3 is a trigonal planar and has a hybridization of sp3