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Naddik [55]
3 years ago
12

9. Consider the diagram below. First, solve for x, then y.

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
7 0

Answer:

y = 32; x = 59

Step-by-step explanation:

On the top triangle x+y+89=180 because a triangle's angles add up to 180 degrees, while a quadrilateral's angles add up to 360 degrees.

Angle 89 and the angle below it are supplementary, meaning together they equal 180 degrees.

180 - 89 = 91

So the angle below 89 is 81 degrees.

Now we can subtract the other three angles in the quadrilateral to find the fourth:

360 - (78 + 43 + 91) = 148

So the angle below y is 148 degrees.

Angle y and the angle below it are supplementary, meaning together they equal 180 degrees.

y = 180 - 148

y = 32

All of the angles in a triangle equal 180 degrees:

x = 180 - (32 + 89)

x = 59

aniked [119]3 years ago
6 0

Answer:

x = 59

y = 32

Step-by-step explanation:

x + 78 + 43 = 180

x = 59

y + 59 + 89 = 180

y = 32

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Answer:  FALSE .
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          For two (2) angles to be supplementary, they must add up to 180° ; 
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Step-by-step explanation:

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