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3 years ago

Find the area of an equilateral triangle with radius 22 cm. Round to the nearest whole number.

Mathematics

1 answer:

earnstyle [38]3 years ago

4 0

Answer:this item, we are given with the radius equal to 22 cm.

In this measurement of the radius is the hypotenuse of the 30°-60°-90° triangle formed with the half the measurement of the side of the equilateral triangle being opposite to the 60° and equal to the hypotenuse times (1/2)(√3)

Step-by-step explanation:

If we let s be the side of the triangle then,

s/2 = r(1/2)(√3)

Multiplying the equation by 2,

s = r√3

Substituting,

s = (22 cm)(√3) = 22√3

The area of the equilateral triangle is computed through the equation,

A = (√3 / 4)(s²)

Substituting,

A = (√3 / 4)(22√3)² = 628.7 cm²

Therefore, the answer to this item is the first choice.

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3 years ago

If you add the lengths of the focal radii of an ellipse, what other value will you produce?

ss7ja [257]

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→having center (0,0) , vertex ( $(\pm a ,0)$ and covertex $(\pm b ,0)$ and focus $(\pm c ,0)$ is given by:

$\frac{x^2}{a^2} + \frac{y^2}{b^2}=1$

As definition of an ellipse is that locus of all the points in a plane such that it's distance from two fixed points called focii remains constant.

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For this case we have the following equation:
P (t) = P (1 + r / n) ^ (n * t)
Where,
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r: interest
n: periods
t: time
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for t = 25:
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Answer:
The future value of this investment when she takes her trip is:
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Step-by-step explanation:

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