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EastWind [94]
3 years ago
11

Determined the perimeter and area of the following figure. Use 3.14 for pi

Mathematics
1 answer:
nataly862011 [7]3 years ago
6 0

Step-by-step explanation:

first you will put a line in the missing part of the inside of the figure.Once you do you will see that there are two figures.

to find the diagonal of the half-circle : 7cm-2cm-1cm=4cm

Now use the area formulas for each figure.The area of the semicircle is pi×d/2.The area of the rectangle is a×b.

A of semicircle =3.14×4cm/2=6.28cm²

A of rectangle =7×3=21cm²

to find the perimeter of them:

P of semicircle = 3.14×4=12.56cm

P of rectangle =2(7+3)=14+6=20cm

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The sum of a number and its square is 182. Find the number.
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Answer:

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Step-by-step explanation:

Let's represent that number as x

and the square of x is x^2

So,

x + x^2 = 182

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x + x^2 - 182 = 182 - 182

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\frac{-1+\sqrt{1+728} }{2}      or         \frac{-1-\sqrt{1+728} }{2}

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Also,

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