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bulgar [2K]
4 years ago
9

The surface area of a cone is found using the formula SA = Pir2 + Pirl. Describe what each part of the formula represents and ho

w these parts are used to calculate the surface area.

Mathematics
2 answers:
Elza [17]4 years ago
8 0

Answer:

<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>will help uh</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

mote1985 [20]4 years ago
5 0

Answer:  the first part is the area of the base:  πr²

You take the radius given, (or half of the diameter given) square that and multiply by the value of Pi, commonly 3.14 or 3.1416  

The second part is the area of the lateral surface. πrh That is the radius times π times the height of the cone.

Step-by-step explanation:

The formula as shown is confusing to me. It is better to show exponents with superscript if possible, or use the caret ^ [shift + 6] on a keyboard before the 2.

The second part is the area of the lateral surface. πrh That is the radius times π times the height of the cone. (using h instead of l seems less confusing as lower case L looks like 1 in some fonts) But people do use<em> πrl  </em>I realize.

Add the two surface areas together to get the total surface area of the cone.

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I feel like this is the same thing from my last question (about how to find arc and angle lengths) but it looks very different.
Gnesinka [82]

Yes it is the same except there are two arcs you need to find the length for in this one.

7 0
4 years ago
Myron is cooking meat. The double number line shows that he needs 1212 hours to cook 55 kilograms of meat. Based on the ratio sh
Alex Ar [27]

Answer:  He needs 20 hours for making 33 kg of meat.

Step-by-step explanation:

Since,  if a a thing in quantity x_1 takes time t_1 and that thing in quantity x_2 takes time t_2

Then, we know that,

x_1\times t_1=x_2\times t_2

\frac{x_1}{x_2} = \frac{t_2}{t_1}

Here, x_1=55 kg, t_1=12 hours, x_2= 33 kg and t_2=?

Thus, \frac{55}{33} = \frac{t_2}{12}

⇒t_2=\frac{55}{33}\times 12

⇒t_2=\frac{5}{3}\times 12

⇒t_2=20

Thus, he needs 20 hours to make 33 kg of meat.

7 0
3 years ago
Read 2 more answers
A line has a slope of 0.5<br> and passes through the point (0,5). What is the equation of the line?
EleoNora [17]

Step-by-step explanation:

Hi there!

From the question;

The slope of the line is 5/10 or 0.5.

Also the equation of the line passes through the point (0,5).

Note: Use one point formula. {i.e (y-y1)=m(x-x1)}

So, use the formula here and keep the values;

(y-5) = 5/10(x-0)

or, 10(y-5) = 5x

or, 10y-50 = 5x

or, 5x - 10y +50 = 0

Therefore, the required equation is 5x - 10y +50 = 0 or x-2y+10 = 0.

Hope it helps!

6 0
2 years ago
Find the value of a. Hint: Draw in the altitude. Pls explain your answers.
morpeh [17]
Wouldn’t you have to divide or subtract the acute degree with 105 and 30?
5 0
3 years ago
I don't understand how to do this so please explain or show me how to get the answer
nekit [7.7K]

Answer:

m<ADB=70°

m<ADC=110°

m<DAC=45°

Step-by-step explanation:

<ADB=<ABD(being isosceles triangle: AD=AB)

<ABD+<ADB+<DAB=180°(sum of the angle of triangle is 180°)

2<ADB+40°=180°(<ADB=<ABD and <DAB=40°)

2<ADB=140°

<ADB=70°

<ADB+<ADC=180°(being straight angle)

70°+<ADC=180°

<ADC=110°

<ADC+<ACD+<DAC=180°( sum of the angle of triangle is 180°)

110°+25°+<DAC=180°

<DAC=45°

4 0
3 years ago
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