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Jlenok [28]
4 years ago
6

1.If mZA = 4x+12 and x = 15, is ZA acute, obtuse, or right? Explain or justify your answer.

Mathematics
1 answer:
spin [16.1K]4 years ago
6 0

9514 1404 393

Answer:

  1. acute
  2. 17

Step-by-step explanation:

1. Put the value of x in the expression and see what the angle measure is.

  m∠A = 4x +12 = 4(15) +12 = 60 +12 = 72

The angle is less than 90°, so is acute.

__

2. The measure of a right angle is 90°, so you have ...

  4x +22 = 90

  4x = 68 . . . . . subtract 22; next, divide by 4

  x = 17

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