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2 years ago

8

A figure is located at (0, 0), (−3, −4), and (−3, 0) on a coordinate plane. What kind of 3-D shape would be created if the figur

e was rotated around the x-axis? Provide an explanation and proof of your answer to receive full credit. Include the dimensions of the 3-D shape in your explanation.

1 answer:

AysviL [449]2 years ago

8 0

Answer:

cone

Step-by-step explanation:

Define the given points:

A = (0, 0)
B = (-3, -4)
C = (-3, 0)

As two points have the same x-coordinate and two different points have the same y-coordinate, the <u>2D shape</u> the points make is a right triangle (see first attached diagram).

As points B and C lie on the <u>same vertical line</u> (x = -3), and point C lies on the x-axis, <u>rotating</u> line segment BC about the x-axis will produce a circle with center C and radius BC (4 units).

As point A lies on the x-axis, it will <u>not move</u> when rotated about the x-axis.

Therefore, the 3D shape the triangle will create is a cone with:

vertex at (0, 0)
center of circular base at (-3, 0)
radius of circular base of 4 units
height of 3 units

(see second attached diagram)

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