The circumference involves 360 degrees.
60 degrees is one sixth of the circle (60/360)
So, one sixth of 72 is 12.
        
             
        
        
        
<span>A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common.One way to determine the greatest common factor is to find all the factors of the numbers and compare them. 
 The factors of 64 are 1, 2, 4, 8, 16, 32, and 64. 
 The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. 
 The common factors are 1, 2, 4, and 8. Therefore, the greatest common factor is 8. 
 The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. 
 The prime factors of 64 are 2, 2, 2, 2, 2, and 2. 
 The prime factors of 72 are 2, 2, 2, 3, and 3. 
 The prime factors in common are 2, 2, and 2, so the greatest common factor is 2 x 2 x 2 = 8.
SummaryA factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common. 
Summary:
 The common factors of 64 and 72 are 1, 2, 4, and 8. 
 The greatest common factor of 64 and 72 is 8.
Or in the short term; the answer is 8</span>
        
             
        
        
        
Answer:
D. 420
The area of a triangle is 

 half of(base× height)
10×16= 160
160÷2=80
That is the surface area of ONE triangle. 
multiply 80 by 4 to get 320
then find the surface area of the square by doing length×width to get 100
Finally add them together
320+100=420
 
        
             
        
        
        
Answer:△JKL∼△STU
When two triangles are similar , then their corresponding sides are proportional and Corresponding angles of one triangle is equal to corresponding angles of another Triangle.
The two Triangles can be similar by following Similarity axiom
Step-by-step explanation:
 
        
                    
             
        
        
        
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