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Masteriza [31]
3 years ago
8

Angles of triangle sand explain how u got each question and answer pls ! ((:

Mathematics
1 answer:
horsena [70]3 years ago
3 0

Answer:

m∠1 = 41°

m∠2 = 85°

m∠3 = 95°

m∠4 = 85°

m∠5 = 36°

m∠6 = 49°

m∠7 = 96°

Step-by-step explanation:

Alright, so to start we have 2 quadrilaterals intersecting to form a triangle, which means that in the shapes with 4 angles, all angles will add up to 360°, while the triangle's angles will add up to 180°

Right off the bat, we can tell that ∠3 and ∠95° are going to be the same, because they're at a perpendicular intersection, which also means that ∠2 and ∠4 will be the same as well

Knowing the ∠3 = 95° means that ∠5 and ∠6 must add up to equal 85°, so that the whole of the triangle equals 180°

Considering that in the first quadrilateral we already have ∠90° and ∠144°, this means that ∠1 and ∠2 have to add up to 126°, to make an even 360° total

If ∠95° is supplementary to ∠2, this means ∠2 = 85°, and since ∠4 and ∠2 are the same, ∠4 also equals 85° - This leaves 41° left for ∠1, and now we can move on to the other quadrilateral

So since we know ∠4 = 85°, and we already have ∠38°, this means that ∠7 and the unmarked angle will add up to equal 237°, so that the entire shape has 360°

Since we know that ∠5 and ∠144° are supplementary, this means ∠5 is equal to 36°, which would make ∠6 = 39°

And lastly we have ∠7, which since ∠6 = 39° this means our unmarked supplementary angle must equal 141° - Now that means that ∠4 + ∠38° + ∠141° = 264° out of 360°, which leaves ∠7 to equal 96°

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ss7ja [257]

Answer:

The answer to your question is:        C = 0.79a + 1.89r

Step-by-step explanation:

Data

Cost = C

apps = $0.79 = a

ringtones = $1.89 = r

               

                C = 0.79a + 1.89r

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A parking lot has spaces reserved for motocyles, cars and vans. There are five more spaces reserved for vans than motorcycles. T
77julia77 [94]

Answer:

  • motorcycles: 20
  • vans: 25
  • cars: 135

Step-by-step explanation:

There are 3 car spaces for each non-car space, so the number of car spaces is 3/4 of the total: (3/4)×180 = 135.

The number of motorcycle spaces is half of 5 less than the remainder, so is ...

  (180 -135-5)/2 = 20

and van spaces are 5 more than that: 25.

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7 0
4 years ago
Answer fast please will give brainliest
DIA [1.3K]

Answer:

Approximately 14.65 kilometers.

Step-by-step explanation:

Please refer to the drawing.

So, to find our distance, we essentially just need to find the value of x.

To do so, we can use the Law of Sines.

Note that ∠a corresponds to the 12km, and ∠c corresponds to x.

So, let's find each of the angles first.

Note that from our ending point, the bearing to the lighthouse is 125°.

This means, if you refer to the drawing:

a+b=90

This is because they are complementary.

We also know that:

90+b=125

From our bearing.

So, let's solve for b. Subtract 90 from both sides:

b=35

Substitute this back into our first equation to acquire:

a+35=90

Subtract 35 from both sides:

a=55\textdegree

Now, we can use the fact that the interior angles of a triangle sum to 180 to find c. We already know that one angle is 36 and the other is 55. So:

36+55+c=180

Add:

91+c=180

Subtract 91 from both sides:

c=89\textdegree

Now, we can use the Law of Sines, which states:

\frac{\sin(A)}{a}=\frac{\sin(B)}{b}=\frac{\sin(C)}{c}

It doesn't really matter which ratio we use as long as we align the sides and angles correctly.

Recall that ∠a correspond to 12km while ∠c corresponds to x.

So, let's substitute 12 for a, 55 for A, x for b, and 89 for B. This yields:

\frac{\sin(55)}{12}=\frac{\sin(89)}{x}

So, to find the distance traveled, we just have to find x.

Cross-multiply:

12\sin(89)=x\sin(55)

Divide both sides by sin(55). This yields:

x=\frac{12\sin(89)}{\sin(55)}

Divide. Use a calculator. Make sure you're in Degrees mode. This gives us:

x\approx14.65

So, the ship approximately traveled 14.65 kilometers from Point A to Point B.

And we're done!

7 0
3 years ago
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