Use the net to find the surface area of the square pyramid. A) 210 in2 B) 320 in2 C) 420 in2 D) 450 in2

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

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

step-by-step explanation:

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