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chubhunter [2.5K]
3 years ago
13

What do the angles in a quadrilateral add up to?*

Mathematics
2 answers:
inn [45]3 years ago
7 0

Answer:

360

Step-by-step explanation:

sum of anlges= (n-2) *180 where n is the no of sides

oksano4ka [1.4K]3 years ago
5 0

Answer:

A quadrilateral is a shape with 4 sides. ......for any quadrilateral ,we can draw a diagonal line to divide it into two triangles.Each triangle has an angle sum of 180 degrees.Therefore the total angle sum of the quadrilateral is 360 degrees.

Step-by-step explanation:

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I need to know the surface area of these
anastassius [24]

9514 1404 393

Answer:

  245 cm²

Step-by-step explanation:

The surface area of a cone is given by ...

  SA = πr(r +s) . . . . where r is the radius, and s is the slant height

Filling in the given values, we have ...

  SA = (3.14)(3 cm)(3 cm +23 cm) = (3.14)(3)(26) cm² ≈ 245 cm²

The surface area of the cone is about 245 cm².

6 0
3 years ago
Given that P = xy.<br> Find P when:<br> x = -5 and y = -9
boyakko [2]

Answer:

45

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Round to 2 decimal places *
EleoNora [17]

Answer: The circumference of the dome is therefore 149.15 feet or 47.5π feet

Step-by-step explanation:

A scale is basically referred to as the ratio of the dimensions of an object as represented in a draft to the real or true dimensions of the object being drafted.

The figure(s) on the left of the ratio sign represents the size and dimensions of the model with respect to the actual size or dimensions of the object. On the other hand, the figure on the right hand size represents the actual dimensions and size of the real object.

So, if an object is being drawn with the ratio, 1cm : 5cm it means that the size of the object is being reduced because every 5cm of the actual object will always be represented by 1cm in the drawing. If the object is being drawn with a scale of 5cm : 1cm then the actual size of the object will be increased in the drawing. That is, for every 1cm in the actual dimensions of the object, there will be a 5cm representation in the drawing.

Now, the architect draws with a scale of 0.25 inches : 1 foot. If the diameter of the hemispherical dome is 23.75 inches in the scale model, then the actual diameter of the dome is:

0.25 inches ------- 1 foot

23.75 inches ------- ? feet

= 23.75/0.25 × 1

= 95 feet

Therefore, the actual diameter of the dome is 95 feet. We are now required to find the circumference of this dome.

The dome is a hemisphere which literally means half of a sphere. So, if the formula for finding the circumference of a sphere is πd, that of a hemisphere will then be πd/2. Since the diameter is already known to be 95 feet, the circumference of the hemisphere =

(π × 95)/2

=47.5π feet

Or

If π = 3.14, then the circumference = (3.14 × 95)/2 = 149.15 feet

The circumference of the dome is 149.15 feet or 47.5π feet

5 0
3 years ago
What is the scientific notation of 112,050?
kirill [66]
The Answer Will Be 1.1205 x 10 To The 5th Power.
3 0
3 years ago
2(x−23)=0 plz answer
Veronika [31]
Don’t get it what r the options
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