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2 years ago

I need help on this I’ve been stuck on it for a little bit I will give you brainliest if you help me and I will give 5 stars

Mathematics

2 answers:

BARSIC [14]2 years ago

8 0

Answer: 27 degrees

Step-by-step explanation:

y is 63 degrees because they are alternate interior angles. Then, 90-63=27 which is the answer.

WARRIOR [948]2 years ago

7 0

Answer:

27°

Step-by-step explanation:

<em>One of the properties of a rhombus is it has 2 perpendicular diagonals.</em>

So each formed triangle is a right triangle.

We can see one of the angles is 63°, so z= 90° - 63°= 27°

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Step-by-step explanation:

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3 years ago

The law of cosines is used to find the measure of Z.

Vlad [161]

we know that

The formula of the law of cosines is

$z^{2}=a^{2} +b^{2}-2*a*b*cos (Z)$

in this problem we have

$16^{2}=18^{2} +19^{2}-2*18*19*cos (Z)\\256=324+361-684*cos (Z)\\256=685-684*cos (Z)\\-429=-684*cos (Z)\\\\cos (Z)=\frac{429}{684}\\\\ \\Z=arc\ cos(\frac{429}{684})\\\\\\Z= 51.157$

Round to the nearest whole degree

Z=51 degrees

therefore

<u>the answer is</u>

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2 years ago

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tigry1 [53]

Answer:

Step-by-step explanation:

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Serjik [45]

Answer:

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Step-by-step explanation:

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