Question

An obtuse ∠GHI
has a measure of 135°
. It contains adjacent angles GHJ
and JHI
. ∠GHJ
has a measure of 112°
. What is the measure of ∠JHI
?(1 point)
Responses

90°
90 degrees

68°
68 degrees

15°
15 degrees

23°
23 degrees
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1 answer

To find the measure of angle \(\angle JHI\), we can use the fact that the sum of the adjacent angles \(\angle GHJ\) and \(\angle JHI\) is equal to the measure of the obtuse angle \(\angle GHI\).

We know:

  • \(\angle GHI = 135^\circ\)
  • \(\angle GHJ = 112^\circ\)

Using the equation:

\[ \angle GHI = \angle GHJ + \angle JHI \]

Substituting the known values:

\[ 135^\circ = 112^\circ + \angle JHI \]

Now, we can isolate \(\angle JHI\):

\[ \angle JHI = 135^\circ - 112^\circ \] \[ \angle JHI = 23^\circ \]

Therefore, the measure of \(\angle JHI\) is \(23^\circ\).

So the correct response is:

23°