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Mathematics 11 Online
bill533:

Given that ∠XQR = 180° and ∠LQM = 180°, which equation could be used to solve problems involving the relationships between ∠XQM and ∠RQM? A)180 + (3a + 39) = (136 − 2a) B)(3a + 39) − 180 = (136 − 2a) C)(136 − 2a) − (3a + 39) = 180 D)(136 − 2a) + (3a + 39) = 180 E)360 − (3a + 39) = (136 − 2a)

bill533:

1 attachment
bill533:

i believe it would be B

Gdeinward:

No. Two angles that make up a line when added equal 18 degrees.

Gdeinward:

they are called supplementary angles.

bill533:

hmmm

bill533:

Angle XQM = Angle RQM = 180

bill533:

it's D

Gdeinward:

correct. GOOD JOB.

Gdeinward:

I mean technically you would want to subtract 1 of the equation from 180 degrees, but thats not an option

bill533:

OK THANK YOU FOR THAT TIP, BUT I UNDERSTAND WHAT YOU MEANT BY IT

bill533:

or could've done it like (136 − 2a) + (3a + 39) = 180 Supplementary angles add to 180°

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