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Shkiper50 [21]
3 years ago
13

Find the area of the semicircle.

Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
6 0
So we know that the area of a full circle is pi multiplied by radius squared
But for a semicircle the area is pi multiplied by radius squared divided by two
So, we do 3.14*3^2/2
Which is 14.13
vodka [1.7K]3 years ago
3 0

Answer:

14.13

Step-by-step explanation:

The formula for area of a circle is πr^2.

This is a semicircle which is half a circle, so the formula for area of a semicircle is (πr^2)/2

The diameter of the circle is 6, which means that the radius is 3. Since the radius of a circle is always half the diameter. (1/2*6=3)

This means we can plug the known values into our formula.

π(3)^2/2

Simplify.

9π/2

Now we plug 3.14 in for π.

9(3.14)/2

28.26/2

14.13

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Please help fast, how many triangles?
Alex787 [66]

Answer:

one triangle

Step-by-step explanation:

The calculation of the triangle has two phases. The first phase calculates all three sides of the triangle from the input parameters. The first phase is different for the different triangles query entered. The second phase calculates other triangle characteristics, such as angles, area, perimeter, heights, the center of gravity, circle radii, etc. Some input data also results in two to three correct triangle solutions (e.g., if the specified triangle area and two sides - typically resulting in both acute and obtuse) triangle).side b, c, and angle α.

b = 9 \ \\ c = 12 \ \\ α = 63\degreeb=9

c=12

α=63°

8 0
2 years ago
The height of a pyramid is doubled, but its length and width are cut in half. What is true about the volume of the new pyramid?
Aleksandr [31]

Answer:

The new pyramid has a volume that is half the volume of the original pyramid.

Step-by-step explanation:

The volume of a pyramid is given by the following equation:

V = \frac{h*l*w}{3}

In which h is the height, l is the length and w is the width.

Modified volume:

height doubled, length and width cut in half. So

h = 2h, l = 0.5l, w = 0.5w

V_{M} = \frac{2h*0.5l*0.5l}{3} = \frac{0.5*h*l*w}{3} = 0.5\frac{h*l*w}{3} = 0.5V[/tex]

That is

The new pyramid has a volume that is half the volume of the original pyramid.

6 0
3 years ago
-2 1/4 divided by (-1 1/2) =
Diano4ka-milaya [45]

Answer:

9/22

Step-by-step explanation:

First:

Convert any mixed numbers to fractions.

Then your initial equation becomes:

−9/4 ÷ −11/2

Applying the fractions formula for division,

=−9×2 divided by 4×−11

=−18/−44

Simplifying -18/-44, the answer is

=9/22

8 0
3 years ago
Find the surface area of the rectangular prism<br><br> 2mi 2mi<br> 4mi
skad [1K]

Answer:

the SA is 40

Step-by-step explanation:

the formula for SA of a rectangular prism is 2(lw + lh + wh)

so it would be: 2(2x2+2x2+4x2)

can i get brainliest please? i only need two more

4 0
3 years ago
Wich is greater 5 divided by 6 or 1 divided by 6 and how did you figure it out?
marysya [2.9K]

Answer:

The answer for this question is 5 divided 6 is greater.

Step-by-step explanation:

because 5 divided 6 is equal to 0.83

and 6 divided by 1 equals to 6

SO the answer is going to be 0.83 which is 5 divided by 6.

GOOD LUCK HOPE YOU GET IT RIGHT


6 0
3 years ago
Read 2 more answers
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