At a music recital, there are 30 chairs.
they are set up in 6 equal rows. find the
number of columns.

30 chairs can be divided into 6 rows of 5. This would result in 5 columns.

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.