Geometry perimeter

Question

Figure ABCDE is a regular pentagon. Segment AE is located at A (2, 1) and E (4,1). What is the perimeter of ABCDE.

Answer 1

First of all a regular pentagon has 5 equal sides.

Find the legnth of the one side then you can simply multiply by 5.

Notice the segment is on the y=1 axis. Since the y coordinate does not change, you only need to find the legnth of the x distance. That distance is 4 -2 or 2 units.

5 times 2 is 10 units.