Will give brainliest, please help

Mathematics

1 answer:

Rus_ich [418]3 years ago

6 0

Answer:

Step-by-step explanation:

A triangle always consists of it being 180 degrees. The box on the triangle on angle A depicts that it is a right angle, 90 degrees. And since Angle B is given at 45, angle C must be 45 degrees as well, since 180-45-90 (triangle angles=given angles for A and B) equal up to 45. When the angles beside the right angle is both identical and the same, the sides that correspond with that triangle is also the same. AC is given at 9 feet, and since Angle C and B both have the same angles, AB must ALSO be a 9ft.

Now, since we know the two sides, it is very easy to find BC, or the hypotenuse of the triangle, using the Pythagorean Theorem: $a^{2} +b^{2} =c^{2}$ , where a and b are sides, and c is the hypotenuse (or the long end) of a right triangle.

We can plug both 9s in for a and b since they're both the same, and it should equal to

9^2+9^2=c^2.

9^2 is 9*9, and that is 81. We have two of these so add them together to find 162. Since c^2 is equal to 162, we would need to square root both sides so we can find a number that equals c.

$\sqrt{162} =c$

We can either plug this into a calculator, and we should get something around 12.72, and that would be the same as C if you plug that value into a calculator.

You can also simplify the radical if you know how to. 162 is 81 times 2 (example) and 81 is 9*9, so we can add that to the outside and 2 is still under the radical. But this would only make sense if you know how to do that.

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what solid 3D object is produced by rotating the triangle about line m with a height of 8 and radius 4

Oksi-84 [34.3K]

Answer:

The diagram of the question is missing, I found a matching diagram, and it is attached to this answer

The 3D object produced is a cone with height 8 and diameter 8 (radius 4)

Step-by-step explanation:

A 3 dimensional solid figure can be formed when a 2 dimensional object is rotated about a line without displacing the object.

when the object in the diagram is rotated about line m, the rotation forms an object with a circular base of diameter 8 units (radius 4) from the base of the triangle and height 8 units, and the 3D object formed is called a cone.

3 0

3 years ago

A type of bamboo holds The Guinness world record for fastest growing plant. It can grow up to 91 cm per day. How fast in inches

Readme [11.4K]

Hey there! This problem seems tricky, but once we figure out how to solve, it becomes much more simple.

It looks like we have two conversions here:

Centimeters to Inches

Days to Hours

To convert them, we need to know their conversion rate, or in other words, how many centimeters are in an inch and how many hours are in a day.

2.54 cm. = 1 in.

1 day = 24 hours

Now that we have these in mind, all we need to do is a bit of division.

We will start with the expression "91 ÷ 24." This will break up our 91 centimeters into 24 hours, giving us the number of centimeters per hour. We use the "curvy equal sign" to show an approximate value.

91 ÷ 24 ≈ 3.7917

But wait! We aren't quite done yet. That expression only represents the number of centimeters per hour. Our question asks us for the inches per hour. Therefore, we need to do another expression.

If we use the expression "3.7917 ÷ 2.54," we will almost get an exact value. Keep in mind that the "2.54" represents how many centimeters are in an inch. Again, the "curvy equal sign" represents an approximate value.

3.7917 ÷ 2.54 ≈ 1.49

Using the logic above, we can say that the bamboo grows about 1.49 inches per hour.

If you have any follow up questions or need further explanations, feel free to ask in the comments!

6 0

3 years ago

Help plz , thank you

Daniel [21]

Answer:

$2\sqrt{10}$