(08.05 MC)
The coordinates A(0,0), B(0, 4), C(3, 4) and D(3,0) are graphed and connected together. What 3-
dimensional shape will be created when this shape is rotated about the y-axis? Provide an
explanation and proof for your answer to receive full credit. (10 points)

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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