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3 years ago

In the surface area formula for cylinders, which expression represents lateral area

1 answer:

6 0

The total surface are of cylinder comprises of the lateral or curved surface area + the area of the flat surface on the top and bottom

The lateral surface area is calculated this way

curved area of the face × height

Here it is a circle and hence its circumference is 2πr

Hence the formula become

2πr × h = 2πrh

So 2πrh is the part that represents the curved area of the cylinder

(Additional info: The area of the faces is given by πr² for one side, since a cylinder has 2 faces

we have πr²+πr²=2πr²

Hence the total surface area is 2πrh +2πr²)

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Alana claims that not all 4-sided polygons with 2 pairs of equal sides are parallelograms. Is she correct. Please explain why

sergiy2304 [10]

Answer:

No, she is not correct

Step-by-step explanation:

Given: Alana claims that not all 4-sided polygons with 2 pairs of equal sides are parallelograms

To check: whether she is correct or not.

Solution:

Any two-dimensional figure formed using straight lines is known as a polygon. Triangles, quadrilaterals are examples of polygons.

A parallelogram is a quadrilateral in which opposite sides are parallel.

Kite is a polygon made up of four sides with two pairs of equal sides that are adjacent to each other but it is not a parallelogram as its opposite sides are not parallel.

So, she is not correct.

6 0

2 years ago

A ribbon is 1.28 meters long. A rope is 2.34 meters longer than the ribbon. How long

satela [25.4K]

Answer:

4.02m

Step-by-step explanation:

carry 1 1

1 . 2 8

+ 2 . 7 4

4 . 0 2

just add the two given numbers

5 0

2 years ago

What is the insverse of the function f(x) =2x+1?

goldenfox [79]

F(x) = 2x + 1

To find the inverse of a function you just need to switch the x by y or vice-versa:

-> y = 2x + 1
-> x = 2y + 1

After that you isolate the y again:

-> 2y = x - 1

-> y = (x-1)/2
-> f^-1 (x) = (x-1)/2

Answer:
$f^{ - 1} (x) = (x - 1) \div 2$

5 0

3 years ago

What is the number of faces (planes) for the following cubes?

Llana [10]

Cube has 6 faces/planes :)

4 0

2 years ago

Which line segments of a triangle do you draw to find the centroid of a triangle?

kogti [31]

Check the picture below.

7 0

3 years ago

Read 2 more answers