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Kruka [31]
3 years ago
6

Which of the following is not a characteristic of non-Euclidean geometry? A. Space is saddle-curved. B. The sum of the angles in

a triangle is always C. The parallel postulate is false. D. There are no straight lines.
Mathematics
1 answer:
kobusy [5.1K]3 years ago
8 0
<span>The correct answer is
A. Space is saddle-curved </span>
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10 POINTS<br> Find the surface area of the regular pyramid. Round to the nearest tenth if necessary.
NNADVOKAT [17]

Answer:

SA=234.8\ yd^2

Step-by-step explanation:

we know that

The surface area of the regular pyramid is equal to the area of the triangular base plus the area of its three triangular lateral faces

step 1

Find the area of the triangular base

we know that

The triangular base is an equilateral triangle

so

The area applying the law of sines is equal to

A=\frac{1}{2}(14^2)sin(60^o)

A=\frac{1}{2}(196)\frac{\sqrt{3}}{2}

A=49\sqrt{3}=84.87\ yd^2            

step 2

Find the area of its three triangular lateral faces

A=3[\frac{1}{2}bh]

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Applying the Pythagorean Theorem

10^2=(14/2)^2+h^2

solve for h

100=49+h^2

h^2=100-49

h=\sqrt{51}\ yd

substitute

A=3[\frac{1}{2}(14)\sqrt{51}]      

A=149.97\ yd^2

step 3

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Adds the areas

SA=84.87+149.97=234.84\ yd^2

Round to the nearest tenth

SA=234.8\ yd^2

5 0
3 years ago
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Look at the triangular prism below. Each triangular face or the
Goryan [66]

Answer:

The volume of the triangular prism is V=72\ cm^3

Step-by-step explanation:

we know that

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L is the length of the prism

step 1

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substitute

B=\frac{1}{2}(3)(4)=6\ cm^2

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we have

B=6\ cm^2

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substitute in the formula of volume

V=6(12)

V=72\ cm^3

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3 years ago
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X 0 1 2 3

P(x) .21 .35 .25 .17

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A person invests $125 at 3% interest. how long will it take to be worth 300
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