Step-by-step explanation:

the 2 figures are regular polygon

2. if you see all the sides of the figure, the opposite sides are congruent meaning equal.

if the lower sides is 18 cm obviously the upper side are also 18 cm.

there are 5cm given so basically you need to minus the 18 cm to 5cm to get the deficiency measure of the other sides

18cm - 5cm = 13 cm

the left and right side had a given of 20 cm and 10 cm so minus again to get the half value

20 cm - 10 cm = 10 cm

3. same process on the number 2

14 m lower side

5m + 5m upper side

14m - 10m = 4m

overall side of right side is 10 m

given:

4m and 8m

8m - 4m = 4m + 2m = 6m

add 2 because the overall side must add up to 10 the right side only have a 8m so plus 2 to make it congruent

I hope you understand