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Contact [7]
3 years ago
8

A prism whose base is a 9-sided polygon is intersected by a plane. In which case could the cross section be a 10-sided polygon?

Mathematics
2 answers:
Black_prince [1.1K]3 years ago
8 0

D.when the plane makes a narrow angle with the base

Vikki [24]3 years ago
5 0
The <u>correct answer</u> is:

D) <span>when the plane makes a narrow angle with the base.

Explanation:

If a cross section of a prism is taken <u>parallel</u> to the base, the cross section will be the <u>same shape</u> as the base.  In this case, it will be a 9 sided polygon.

If a cross section of a prism is taken <u>perpendicular</u> to the base, the cross section will be a <u>rectangle</u>, no matter how many edges the cross section goes through.

The only way to get a cross section with more sides than the original figure is to take a slant cross section, or one with an angle other than 90</span>° or 180° to the base.  This makes D our only option.
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AB = 44 + 3xBC = 33 + yCD = 64 − xAD = 48 − 2yQuadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruen
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The lengths (in centimeters) of the opposite side pairs are 59 cm , 38 cm. Option C) is the correct answer.

<u>Step-by-step explanation</u>:

<u>step 1</u> :

Given that,

Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent.

<u>step 2</u> :

The opposite sides are AB and CD respectively.

The another opposite sides are BC and AD respectively.

<u>step 3</u> :

If both pairs of opposite sides are congruent, then

AB = CD

44+3x = 64-x

3x+x = 64-44

4x = 20

x = 5

<u>step 4</u> :

BC = AD

33+y = 48-2y

y+2y = 48-33

3y = 15

y = 5

<u>step 5</u> :

Subsitute x=5 and y=5 in any of the given sides,

CD = 64-x = 64-5 = 59

∴ CD = 59 cm

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∴ BC = 38 cm

The lengths of the opposite side pairs are 59 cm , 38 cm.

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3 years ago
Alex sold 165 raffle tickets, which was about 70% of the number of tickets sold by his brother Zane. Approximately how many tick
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Part (a)

<h3>Answer: 2(2.4+w) = 14.2</h3>

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Explanation:

We'll solve the equation we set up in part (a)

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