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2 years ago

36 ft 41 1/2 ft find the area

Mathematics

1 answer:

Likurg_2 [28]2 years ago

4 0

36*41.5=1494
1494 is the area

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PLEASE HELP, 30 points AND brainliest if I get an explanation :)

Nostrana [21]

Answer:

Please check the explanation.

Step-by-step explanation:

BLUE PENTAGON

The blue shape represents the Pentagon

The length of the side a = 7

As there are 5 sides.

Thus,

The Perimeter of the Blue Pentagon = P = 5a = 5(7) = 35

Using the formula to determine the area of the Pentagon

$A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}a^2\:\:\:\:\:\:\:\:\:\:\:\:\:$

$A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}\left(7\right)^2\:\:\:\:\:\:$

$A\approx 84.3\:\:\:$

Thus,

The Area of the Blue Pentagon = $A\approx 84.3\:\:\:$

RED PENTAGON

The red shape represents the Pentagon

The length of the side a = 4

As there are 5 sides.

Thus,

The Perimeter of the Red Pentagon = P = 5a = 5(4) = 20

Using the formula to determine the area of the Pentagon

$A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}a^2\:\:\:\:\:\:\:\:\:\:\:\:\:$

$A=\frac{1}{4}\sqrt{5\left(5+2\sqrt{5}\right)}\left(4\right)^2\:\:\:\:\:\:$

$\:A\approx 27.5$

The Area of the Red Pentagon = $\:A\approx 27.5$

Conclusion:

The Perimeter of the Blue Pentagon = 35

The Perimeter of the Red Pentagon = 20

Thus, the ratio of the perimeter is: 35/20 = 7/4

The Area of the Blue Pentagon = 84.3 = 843/10

The Area of the Red Pentagon = 27.5 = 275/10

Thus, the ratio of the Area is:

$\frac{\frac{843}{10}}{\frac{275}{10}}=\frac{843}{275}$

7 0

2 years ago

Help plz i’ll give extra points

swat32

elevation in feet = 8.56(140) + 674

elevation in feet = 1872.4

Round to the nearest whole number: 1872

Answer: 1872

4 0

2 years ago

Y=230 + 3x help will give brainleyest

Alja [10]

X = -230/3 hope that helps

4 0

2 years ago

Read 2 more answers

Anyone............I will give BRAINLIEST

posledela

Answer:

100 cm²

Step-by-step explanation:

Area of the larger circle:

A = π(2r)² = 4πr²

The shaded area:

π(2r)² - πr² = 75
3πr² = 75
πr² = 25

Area of the larger circle:

A = 4(25) = 100 cm²

6 0

2 years ago

The base of a triangle is 10 cm

bonufazy [111]

I’m not sure about this question

4 0

2 years ago