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3 years ago

Which statement is true about every rectangular pyramid?

Mathematics

2 answers:

fiasKO [112]3 years ago

7 0

Answer:

At least two of the lateral faces are congruent. This is the true statement.

Step-by-step explanation:

The correct statement is : At least two of the lateral faces are congruent.

A rectangular pyramid is a 3-D shape that has a rectangular base. Each corresponding side with respect to base, contains triangular faces. The triangular faces are called lateral faces and they meet at the apex. These faces are congruent to each other.

Lorico [155]3 years ago

4 0

<span>The following statement is true: At least two of the lateral faces are congruent.

Because the words "at least" are used this means that at a minimum 2 of the faces are congruent. Because the base is in the shape of a triangle, this will definitely be true. The sides directly across from each other will be congruent and if the base is a square (which is also defined as a rectangle) than all 4 sides would be congruent.</span>

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60 + 90

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Step-by-step explanation:

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Given that the value of x is between 0 and 360 degrees (0 and 360

Brums [2.3K]

Answer:

150° and 210°
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Step-by-step explanation:

It is convenient to memorize the trig functions of the "special angles" of 30°, 45°, 60°, as well as the way the signs of trig functions change in the different quadrants. Realizing that the (x, y) coordinates on the unit circle correspond to (cos(θ), sin(θ)) can make it somewhat easier.

You have memorized that cos(x) = (√3)/2 is true for x = 30°. That is the reference angle for the 2nd-quadrant angle 180° -30° = 150°, and for the 3rd-quadrant angle 180° +30° = 210°.

Cos(x) is negative in the 2nd and 3rd quadrants, so the angles you're looking for are

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<h3>Bonus</h3>

You have memorized that sin(π/4) = √2/2, and that cos(3π/4) = -√2/2. The sum of these values is ...

√2/2 + (-√2/2) = 0

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<em>Additional comments</em>

Your calculator can help you with both of these problems.

The coordinates given on the attached unit circle chart are (cos(θ), sin(θ)).