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Afina-wow [57]
3 years ago
13

What is the measure ​

Mathematics
1 answer:
nekit [7.7K]3 years ago
5 0

Answer:

b = 12

Step-by-step explanation:

Complementary angles add to 90 degrees

a+b = 90

78+b = 90

Subtract 78 from each side

78-78+b = 90-78

b = 12

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Flura [38]
We have that
coordinates  are
<span>A(12,7), B(12,−3), C(−2,−3), and D(−2,7) 
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4 0
3 years ago
What is the length of AC?
Elan Coil [88]

well, the triangle is an isosceles, so it twin sides, and the twin sides make twin angles, as we see by the tickmarks on A and C, meaning AB = BC.

\bf x+4=3x-8\implies 4=2x-8\implies 12=2x\implies \cfrac{12}{2}=x\implies 6=x \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ AC\implies x+4\implies 6+4\implies 10

6 0
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Help me out I gotta good grade to graduate
Dahasolnce [82]

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Step-by-step explanation:

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x = -3

3 0
3 years ago
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