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vagabundo [1.1K]

2 years ago

14

Which of the objects shown above are pyramids?

1 answer:

PolarNik [594]2 years ago

7 0

<h3>Answer: A and B (first answer choice)</h3>

Explanation:

Both figures shown in A and B are triangular pyramids. The base is a triangle, and the lateral sides are also triangles. Another example would be rectangular pyramids where the base is a rectangle, and the lateral sides are triangles.

Choice C is ruled out because cones aren't considered pyramids.

Choice D is a combination of a rectangular prism, and a rectangular pyramid stacked on top, so it's not purely a pyramid only. We can rule out choice D.

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nadezda [96]

Mary has to buy 5 apple. each apple is 25 cents. how much money does mary have to spend?

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2 years ago

Can someone please answer this for me.

Levart [38]

Answer:

See picture

Step-by-step explanation:

The rule is ...

$x^{m/n}=\sqrt[n]{x^m}$

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2 years ago

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Prove :<br>sin²θ + cos²θ = 1<br><br><br>thankyou ~

Gnom [1K]

Answer:

See below

Step-by-step explanation:

Here we need to prove that ,

$\sf\longrightarrow sin^2\theta + cos^2\theta = 1$

Imagine a right angled triangle with one of its acute angle as $\theta$ .

The side opposite to this angle will be perpendicular .
Also we know that ,

$\sf\longrightarrow sin\theta =\dfrac{p}{h} \\$

$\sf\longrightarrow cos\theta =\dfrac{b}{h}$

And by Pythagoras theorem ,

$\sf\longrightarrow h^2 = p^2+b^2 \dots (i)$

Where the symbols have their usual meaning.

Now , taking LHS ,

$\sf\longrightarrow sin^2\theta +cos^2\theta$

Substituting the respective values,

$\sf\longrightarrow \bigg(\dfrac{p}{h}\bigg)^2+\bigg(\dfrac{b}{h}\bigg)^2\\$

$\sf\longrightarrow \dfrac{p^2}{h^2}+\dfrac{b^2}{h^2}\\$

$\sf\longrightarrow \dfrac{p^2+b^2}{h^2}$

From equation (i) ,

$\sf\longrightarrow\cancel{ \dfrac{h^2}{h^2}}\\$

$\sf\longrightarrow \bf 1 = RHS$

Since LHS = RHS ,

Hence Proved !

I hope this helps.

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1 year ago

Square ABCD and isosceles triangle EFG have the same perimeter. Work out the length of FG.

s344n2d4d5 [400]

Answer:

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Step-by-step explanation:

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2 years ago

In a sale, all prices are reduced by 25%. Work out the

Leno4ka [110]

Answer:

1650

Step-by-step explanation:

2200*.25=1650 sale price

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3 years ago