9- x=20 20 divided by 2 equals 10. 10+8=18
10- I would say that x=3 because 3x3=9. If you add 9 and 12 together it’s 21. 21 is less than 64.
Hope that helps!
The area of the pentagon is 1,453 squared centimeters.
Given information-
The length of the apothem of a regular pentagon is 20 cm.
The measure of the perimeter of a regular pentagon is 145.3 cm.
The length of the apothem of a rectangular pentagon is 20 cm.
The measure of the perimeter of a rectangular pentagon is 145.3 cm.
<h3>Pentagon-</h3>
Pentagon is the closed shaped polygon which has 5 sides. When these 5 sides are equal in length then the pentagon is called teh regular pentagon. When four of the sides of pentagon make a rectangle then the pentagon is called the rectangular pentagon.
<h3>Area of regular pentagon-</h3>
Area of regular pentagon is half of the product of its apothem and perimeter. It can be given as,
![A=\dfrac{1}{2} \times 20\times 145.3\\A=1453](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7B1%7D%7B2%7D%20%5Ctimes%2020%5Ctimes%20145.3%5C%5CA%3D1453)
Thus the area of the pentagon is 1,453 squared centimeters.
Learn more about the regular pentagon here;
brainly.com/question/858867
Y would be 18 because 260 * .2 = 52, so 90 * .2 = 18.
8.33km; approximately 8km
Answer:
483.75 is needed
Step-by-step explanation:
161.25 * 4 = 645.00
645.00 - 161.25 =