I only need number 18 and 19 please show work if you can

Step-by-step explanation:

Size of Exterior angle = 360°/n, where n represent the number of sides of the regular polygon.

Question 18:

Pentagon = 5 sides,

Exterior angle = 360°/5 = 72°.

Question 19:

Exterior angle = 360°/36 = 10°.

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80