Answer:
See explanation
Step-by-step explanation:
We want to verify that:

Verifying from left, we have 

Expand the perfect square in the right:

We expand to get:

We simplify to get:

Cancel common factors:

This finally gives:

 
        
             
        
        
        
It’s 12 
On the first side (smaller triangle/ ABC) the give you one side that equals 4 and on the next triangle (bigger triangle/ DEF) it’s 8 meaning you’re going to multiply each corresponding side by 2 
        
             
        
        
        
2.8 meter= 2800cms
To solve this, we can create a simple algebraic equation:
45x=2800
Divide both sides by 45.
(45x)/45=(2800)/45
x=62.222
You can make 62 full pieces.
To find the waste, multiply the numbers of pieces by the length of each.
62*45
=2790
2800-<span>2790
=10 centimeters
There would be 10 centimeters of wasted linen.
Hope this helps!
-Benjamin</span>
        
             
        
        
        
Answer:
Step-by-step explanation:
height	h = 11 cm
slant height	s = 11.180339887499 cm
side length	a = 4 cm
lateral edge length	e = 11.357816691601 cm
1/2 side length	r = 2 cm
volume	V = 58.666666666667 cm3
lateral surface area	L = 89.442719099992 cm2
base surface area	B = 16 cm2
total surface area	A = 105.44271909999 cm2