Carcass wrote:
Attachment:
triangle.jpg
\(x < 90\)
Quantity A |
Quantity B |
y |
70 |
If angle x is less than 90 degrees, we can express this as follows...
NOTE: (90-)° does NOT mean "negative 90 degrees"; that notation means "an angle that's
less than 90 degrees"
Since angles on a line must add to 180°, we can conclude that the other angle must be
more than 90 degrees, which we'll express as follows:
At this point, we know that the 3 angles in the triangle must add to 180°
So, we can write: y + 20 + (90+) = 180
Notice that 20 + (90+) = 110+ (an angle that greater than 110 degrees)
So, we can write: y + (110+) = 180
If the equation were y + 110 = 180, then we'd conclude that y EQUALS 70
However, since the equation is y + (110+) = 180, we can conclude that
y is LESS THAN 70Answer: B
Cheers,
Brent
_________________
Brent Hanneson – Creator of greenlighttestprep.com
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