False, vertical angles are not next to each other but opposite of each other
        
             
        
        
        
Answer:
B. 
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.  
Please have a look at the attached photo.  
My answer: 
As given in the question, we know that: 
The ratio of the area of the circle to the area  of the square is π/4
- The formula to find the volume of the cone is: 
 
V = 1/3*the height*the base area
<=> V1 = 1/3*h*π
 
- The formula to find the volume of the pyramid is: 
 
V2 = 1/3*the height*the base area
<=> V =  1/3*h*4
 
=> the ratio of volume of the cone to the pyramid is: 
= 
= (1/3*h*π
 ) / ( 1/3*h*4
 )
= π/4 
S we can conclude that the volume of the cone equals π/4  the volume of the  pyramid
Hope it will find you well. 
 
        
             
        
        
        
Find the price and quantity
Qs=p2 + 2ps-15
        
             
        
        
        
Hi, I think the answer may be 2.
How I got my answer:
If x equals 18, divide 18 by 3 and you'll get 6, then divide 6 by the other 3 and your quotient should be 2.
Hope I helped!
        
                    
             
        
        
        
Answer:
The surface area of the cone is 126π cm².
Step-by-step explanation:
The surface area of a cone can be found using this formula:

- where r = radius and l = slant height 
 
In this problem, we are told that the cone has a radius of 9 cm and a slant height of 5 cm.
Substitute these values into the formula for the surface area of a cone.
The surface area of the right cone is 126 π cm².