Want this question answered?
The sum of the three constitutive angles of a planar triangle is always equal to 180 degrees or two right angles. And there are two things in it as well. they are diagonal and a exterior angle
obtuse angle
That's a reflex angle. 0 to <90 Acute angle 90 Right angle >90 to <180 Obtuse angle 180 Straight angle >180 to <360 Reflex angle 360 called Full circle
just an angle, like any other angle.
An obtuse angle.
For a truly trigonal planar molecule the bond angles are 120 0 exactly.
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.
120 degrees
Carbonate ion is in a trigonal planar shape (hint: sp2 hybridization)
BH3 has a trigonal planar shape with 120 angles.
Trigonal Planar (120 degrees)
The NO2 molecule is a bent molecule with a central nitrogen attached to two oxygen atoms. The bond angle between the N-O bonds is 134.30
Trigonal Pyramidal - 107.5 degrees It has 3 bonds and one lone pair. With all 4 elements (the 3 covalent bonds plus the lone pair) you would think it was Tetrahedral, with 109.5 degrees between them, but because the lone pair is there, it pushes the other bonding electrons closer together and thus you have a smaller angle of 107.5 degrees and the different shape.
N2 is a linear molecule. The bond angle is 180o. Since there are only two atoms, this is the only shape that the nitrogen molecule can have.
This molecule has a linear shape and it is also important to note that it is polar.
CH3 is a trigonal planar and has a hybridization of sp3
it is a trigonal planar....a trigonal planar is when you have 4 atoms. 3 atoms surround one atom(central atom, in this case C).