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Amiraneli [1.4K]
3 years ago
13

Each of a regular polygon is 140°,find the number of the sides that ghe polygon has​

Mathematics
2 answers:
Sloan [31]3 years ago
5 0

Answer:

the answer should be 360/36=10 sides

Step-by-step explanation:

A regular polygon is 144 deg the exterior angle is 36 deg.

Troyanec [42]3 years ago
4 0

Answer:

9 sides

Step-by-step explanation:

Internal angles of the regular polygon have a property, sum of interior angles is equal to:

  • sum = (n-2)*180°

n sides each interior angle equal to 140°, then

  • sum = 140°n

Comparing the two equations:

  • (n-2)*180= 140n
  • 180n - 360 = 140n
  • 40n = 360
  • n = 360/40
  • n = 9

The polygon has 9 sides

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Ben is 12 years older than Ishaan. Ben and Ishaan first met two years ago. Three years ago, Ben was 4 times as old as Ishaan.
Nitella [24]
Let x be the age of ishaan so the age of ben will be 12+x. the equation will become x=x+12
Going 3 years back, the age of ishaan was x-3 so that of ben would be x+12-3 before 3 years. at that time the age of ben was 4 times the age of ishaan. it means x+12-3(the age of ben)=4(x-3(the age of ishaan))
solving this equation, we get the answer x=7. this is the age of ishaan in the present.
5 0
3 years ago
Read 2 more answers
Explain this please!
vazorg [7]

Answer:

435 ft

Step-by-step explanation:

area of triangle:

A = (b x h) : 2

A = (15 x 4) : 2

A = 60 : 2

A = 30 ft

area of rectangle:

A = b x h

A = 25 x 15

A = 375 ft

area of the yard = area of the triangle + area of the triangle + area of the rectangle (Here, both triangles have the same area.)

area of the yard: 30 + 30 + 375 = 435 ft.

So, the area of the yard is 435 ft.

I hope this was helpful. :)

Please, do me Brainliest!

5 0
3 years ago
735 mil. Trip in 15 hours what was their average rate
nikdorinn [45]

Answer:

`49 MPH

Step-by-step explanation:

If it took them 15 hours to go 735 miles, and you are trying to find the average rate, then divide the miles by the time (in hours), so for this specific problem, it would be 735 divided by 15 hours, and you will find the answer as 49. (MPH)

5 0
3 years ago
A heap of grain is shaped as a cone ADCF with height 5 m and base radius 2 m, as shown on the diagram. A and C are points on the
hoa [83]

Answer:

The angle between [A_F] and the base of the cone = 68.2°

The area of the base of the cone ≈ 12.57 m²

Step-by-step explanation:

The given parameters are;

The height of the cone = 5 m

The base radius of the cone  = 2 m

The angle which the A\hat OC = 120°

Therefore, we have;

The angle between [A_F] and the base of the cone = The angle between [CF]  and the base of the cone

The angle between [CF]  and the base of the cone = tan⁻¹(5/2) = tan⁻¹(2.5) ≈ 68.2°  

∴ The angle between [A_F] and the base of the cone = The angle between [CF]  and the base of the cone = 68.2°

The angle between [A_F] and the base of the cone = 68.2°

The area of the base of the cone = π × r² = π × 2² = 4·π ≈ 12.57

The area of the base of the cone ≈ 12.57 m².

8 0
3 years ago
A bicycle has a listed price of $519.95 before tax. If the sales tax rate is 9.75% , find the total cost of the bicycle with sal
jek_recluse [69]
Youre finding 9.75% of 519 you know its going to be near 50 dollars
your answer is 50.695125
or 50.70$ tax
519.95+50.7 = 570.65$ total
7 0
3 years ago
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