Less. There are 100 centimeters in a meter, so 90 cm would be 10 cm less than a meter.
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obtuse- more than 90 degreesacute-less than 90 degreesIf it is more than 90 degrees
acute. obtuse is larger than 90 but less than 180.
Acute
Acute - less than 90 degrees Right - exactly 90 degrees Obtuse - more than 90 degrees but less than 180 degrees
it depends it can be acute(less than 90 degrees (more than 90 degrees), or right(90 degrees)