3 years ago

What is x??? Please explain.

Mathematics

2 answers:

tresset_1 [31]3 years ago

7 0

X is 78 because vertical angles are congruent

kari74 [83]3 years ago

6 0

Answer:

78°

Step-by-step explanation:

when two lines intersect it creates 4 seperate angles, here it gives us 78°, and we know that the angle across from it is the same, so they equal.

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Answer
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Step-by-step explanation:

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3 years ago

What is the measure of angle A please help I’ll give you BRAINLIEST

beks73 [17]

Answer:

$A = 38^\circ$

Step-by-step explanation:

Given

$a = 5$

$b = 3$

$c = 7$

Required

Determine the measure of A

To do this, we apply cosine law as follows:

$a^2 = b^2 + c^2 -2bcCosA$

$5^2 = 3^2 + 7^2 -2*3*7*CosA$

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Make CosA the subject

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