It only has 3 significant figures, 863.
The molecular geometry of the AsO2- ion is bent (because of the lone electron pair with the central arsenic atom, making the O-As-O bond angle very obtuse) but its electron domain geometry is trigonal planar because there are three domains, with a 120 deg. angle between them.
something dealing with physics.....
Acoustics is part of Physics, and is the general field dealing with noise control, music, architecture and so on. Audiology is the branch dealing with hearing.
5 significant figures Each figure that contributes to the accuracy of a value is considered significant. So 2.9979 has 5 significant figures. The 10^8 does not contribute to the accuracy as it simply indicates the number of trailing zeroes (i.e. 299,790,000) that are simply a result of rounding from the actual value (299,792,458)
Solid Geometry
That's called "solid geometry".
Geometry.
usually figures in math is dealing with a diagram in a text book or numbers dealing with money
Of course, they are geometric figures.
there are 68
There are many special figures in geometry and some of them are pyramid, cone, cylinder, sphere, circle, prism, polygon, polyhedron ..... etc
Geometry
Geometry
Figures that have no perimeter such as a strairght line or the arc of a circle
Euclidean Geometry
solid geometry deals with 3 dimensional figures while plane geometry deals with 2 dimensional.