Probably easy but im not smart so Jeff is building a circular plaque with a radius of 8 inches. He wants to cover about half of the plaque in circular rhinestones. If each rhinestone has a diameter of 0.5 inches, approximately how many rhinestones will he need?
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1,000

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

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step-by-step explanation: