The decagon has a

-fold reflectional symmetry.

The order of rotational symmetry for the decagon is

.

The smallest angle of rotational symmetry for the decagon is

degrees.

1). Fold reflection symmetries = 5

2). Order of rotational symmetries = 10

3). Smallest angle of rotational symmetry = 36°

Step-by-step explanation:

A decagon has number of fold reflection symmetries = 5

[Fold reflection symmetries are the lines by which we can fold the shape into half]

Order of rotational symmetry of a decagon = 10

[Order of rotational symmetry means number of rotations by which the polygon maps itself in a complete rotation of 360°]

Smallest angle of rotational symmetry for a decagon

=

=

= 36°

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!