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If you double the size of an acute angle to form a new angle, what type of angle will the new angle be?

The new angle will always be an acute angle.

The new angle will always be a right angle.

The new angle could be either an acute or obtuse angle, but never a right angle.

The new angle could be either an acute, right, or obtuse angle, but never a straight angle.

The new angle could be either an acute, right, obtuse, or straight angle.

The new angle must be an obtuse angle.