8.7 you need to do the Pythagorean theorem
You were given one side length and the hypotenuse so your equation should b 18^2+x^2=20^2
Answer:

Step-by-step explanation:

Hope this helps.
18.386 rounded to the nearest hundredth would be 18.39
Answer:
19
Step-by-step explanation:
133 divided by 7 = 19
area of a parallelogram is just L x W so just divide to get the base.