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3 years ago

The figure below is a square pyramid. Which of the following could not be a cross section in the figure?

Mathematics

2 answers:

exis [7]3 years ago

7 0

Answer:

A rectangle that is not a square is the actual answer.

babunello [35]3 years ago

3 0

If you run a plane like in the picture below, I don't think you could get an isosceles triangle, namely, a triangle with two equal sides.

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a street light is at the top of a 18 ft tall pole. a woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a s

shutvik [7]

The most appropriate choice for similarity of triangles will be given by -

Speed of tip of the shadow of woman = 6 ft/s

What are similar triangles?

Two triangles are said to be similar, if the corrosponding angles of the triangles are same and the corrosponding sides of the triangles are in the same ratio.

Here,

The diagram has been attached here

Let the distance of woman from the pole be x ft and the distance of tip of the shadow to the pole be y ft.

Height of street light = 18 ft

Height of woman = 6ft

The two triangles are similar [As height of woman is parallel to the height of pole]

$\frac{y - x}{6}=\frac{y}{18}\\18y - 18x = 6y\\18y - 6y = 18x\\12y = 18x\\y = \frac{18}{12}x\\y = \frac{3}{2}x\\$

To find the speed, we have to differentiate both sides with respect to time 't'

$\frac{dy}{dt} =\frac{3}{2}\frac{dx}{dt}\\\frac{dy}{dt}=\frac{3}{2} \times 4\\\frac{dy}{dt} = 6$

Speed of tip of her shadow = 6 ft

To learn more about similarity of triangles, refer to the link-

brainly.com/question/14285697

#SPJ4

6 0

11 months ago

An irrational number written in

Arlecino [84]

Answer:

B. repeating

Step-by-step explanation:

An irrational number written in decimal form will be nonterminating and non-repeating decimals.

For example we have √2 = 1.4142

This rational number is non-terminating and non-repeating.

4 0

3 years ago

Which graph does not represent a function

Marysya12 [62]

Answer:

Graph D

Step-by-step explanation:

it does not pass the linear test to qualify as a function

3 0

3 years ago

Read 2 more answers

A surveyor starts at the southeast corner of a lot and

elena-s [515]

Find the difference vertically( North and South) and the difference horizontally ( East and West)

Then use the Pythagorean Theorem.

600 North - 200 South = 400 m

400 West - 100 East = 300 m

Now using the Pythagorean Theorem;

400^2 + 300^2 = total displacement^2

Total displacement^2 = 160,000 + 90,000

Total displacement^2 = 250,000

Total displacement = √250,000

Total displacement = 500 m

7 0

2 years ago

A triangle has side lengths of 13 feet, 18 feet, and 12 feet. What kind of triangle is it?

3241004551 [841]

This is a scalene triangle

5 0

2 years ago

Read 2 more answers