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aivan3 [116]
3 years ago
5

Work out the perimeter of this semicircle. take pi to be 3.142​

Mathematics
2 answers:
Vanyuwa [196]3 years ago
8 0

Answer:

P = 25.71 cm

Step-by-step explanation:

Perimeter of semicircle = πD/2

Where D=10 cm

P = (3.142)(10)/2

P = (3.142)(5)

P = 15.71 cm

Complete Perimeter of Semicircle = P + Diameter

= 15.71 + 10

= 25.71 cm

Ber [7]3 years ago
8 0

Answer:

25.71cm

Step-by-step explanation:

3.142 x 10 = 31.42

31.42/2 = 15.71 (half of the circumference)

15.71 + 10(the diameter).

= 25.71cm

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Find the area of the right triangle. If necessary, round to the nearest tenth.
natita [175]

Answer:

a.  75 m

Step-by-step explanation:

Given,

Length of hypotenuse = 18m

Length of perpendicular = 10 m

To find:

Area of the right angled triangle

Formula to find area of the right angled triangle = \frac{perpendicular * base}{2}

To find: Length of base

Hypotenuse² = Perpendicular² + Base²

Base² = Hypotenuse² - Perpendicular²

Base² = 18² - 10²

Base² = 324 - 100

Base² = 224

Base = \sqrt{224}

Base = 14.97 m

Area of the right angled triangle = \frac{perpendicular * base}{2}

⇒ \frac{10 * 14.87}{2}

⇒ 74.85 m² or,

round to the nearest tenth = 75 m²

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3 years ago
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Ksenya-84 [330]

Answer:

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y-intercept = (0, -34)

Step-by-step explanation:

slope m = change in y ÷ change in x

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= -5 ÷ 1

= -5/1

y = mx + b  ⇒  y = -5x + b

substitute one of the points

-4 = (-5 x -6) + b

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b = -34

Therefore, y-intercept = (0, -34)

4 0
2 years ago
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allsm [11]

Answer:

62.8319 ≈ 62.8 inches

Step-by-step explanation:

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What's a rational number between 7.7 and 7.9?
svet-max [94.6K]
A rational number is a number that can be expressed as the relationship between two integers. Fractions and decimals will either repeat or end. An example is 5. Maybe 7. 53573 is an example as well. So is 5/1, because 5 and 1 are both integers. so is 7.5, because 7 and 5 are both integers, and it ends (the numbers after the decimal doesn't keep going). Your answer is 7.8, because it ends. 
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3 years ago
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Semenov [28]

Step-by-step explanation:

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