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brilliants [131]
3 years ago
6

Could you please help me out ?

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
3 0
1. The sum of the interior angles of a triangle is 180º, so we have:
 
 m∠K= 180º-58º-38º
 m∠K= 84º 
 
 2. If we draw a perpendicular segment from "K" to "k", we will obtain two right triangles and we can find the value of "k".
 
 3. Let's find the heigh ot these two triangles (The perpendicular segment from "K" to "k", which we will call "y"):
 
 Sen(α)=Opposite leg/Hypotenuse
 Sen(58º)=y/2.3
 y=2.3xSen(58º)
 y=1.95 units
 
 4. Now we must find the adjacent leg of the triangle on the left:
 
 Cos(α)=Adjacent leg/Hypotenuse
 Cos(58º)=Adjacent leg/2.3
 Adjacent leg=1.21 units
 
 5. Let's find the adjacent leg of the other triangle:
 
 Tan(38º)=Opposite leg/Adjacent leg
 Adjacent leg=2.49 units
 
 6. The lenght of "k" is:
 
 k=2.49 units+1.21 units
 k=3.7 units
 
 7. The length KL is:
 
 Cos(38º)=Adjacent leg/Hypotenuse
 Cos(38º)=2.49/KL
 KL=2.49/Cos(38º)
 KL=3.15 units
 KL≈3.2 units
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Answer:

<h3>             The true statement is the first:</h3><h2>         Measure of angle A = 20 degrees</h2>

Step-by-step explanation:

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m∠A + m∠B + m∠C = 180°

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Step-by-step explanation:

We are given that

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Substitute y=0 in equation (4)

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Substitute x=0 and y=40 and in equation (1)

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Hence, the value of x lies between 20 and 40 and value of y lies between -20 and 10.

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Let's solve below:

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