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Kay [80]
3 years ago
11

Please help I will give brainliest

Mathematics
1 answer:
enot [183]3 years ago
8 0

Answer:

100°

Step-by-step explanation:

First, remember that flat angles are always 180°,

So the angle of B is 40° because they form that kind of angle.

Now, you can notice that both sides of the triangle have the same value.

That means the angle is the same too.

So, the third angle is also 40°

Last but not least the addition of all angles in a triangle is always 180°

With that in mind we just solve the next equation:

40° + 40° + a° = 180

a° = |80 - 80

a = 100°

And that is how we find the answer, hope it was helpful ;)

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Answer:

x=26

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Step-by-step explanation:

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3 years ago
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Tamir wants to build a square wooden stage. His original pin for a stage x
shepuryov [24]

Answer:

b .  

Area=(x-5) (x-3)

Area =  x^2 -8x+15

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:  

Area of a rectangle = width x length

The original length and width was x, so if the stage needs to be 5 feet narrower and 3 feet shorter.

x-5

x-5

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4 years ago
Perform all the steps to evaluate this expression.
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4 0
3 years ago
ASAP Plz what is the value of x? Plz no joking around this is from quiz 4.09: Special Right Triangles 2
Sunny_sXe [5.5K]
Ooh this is a good one!
Firstly, let's find RT so that we can solve the top triangle.
We could actually use 3 methods to find this side: 1) trig to find RT
2) trig to find ST, then Pythagorean Theorem to determine RT
3) use the special 30-60-90 right triangle rule ... hmm, I'm going with the last because it's easiest ;)

For 30-60-90 triangles, the sides are always as follows: smallest side (opposite the 30) is s, the middle side is sSR3, and the hypotenuse is 2×s
Thus, since we have the side opposite 60, it is = sSR3, so:
s \sqrt{3}  = 2 \sqrt{3}  \\ s \sqrt{3} \div  \sqrt{3}   = 2 \sqrt{3} \div  \sqrt{3}  \\ s = 2
So now, the hypotenuse (RT) = 2s = 2(2) = 4

Secondly, we are looking at the other type of special right triangle, the 45-45-90:
The side opposite the 45s are s (remember side lengths are equal whose opposite angles are equal); and the hypotenuse is always
s \sqrt{2}
we only need QR, which is s, which is also = RT
So the answer is:
QR = x = 4

x = 4 IS THE FINAL ANSWER!!!


[ i hope by my explanations you understand how better to do special right triangles in the future] :-D
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