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acute angle right angle obtuse angle Check all of the correct answers that apply to the diagram below. less than 90' acute angle Check the correct answer that matches the diagram below. exactly 90' obtuse angle right angle How many degrees is a straight angle? 90' 360' 180' What are the names of the angles below? 90' angle 68' angle Classify each angle as acute, obtuse, right, or straight Are angles 3 and 1 vertical angles? (yes/no) Are angles 3 and 1 opposite angles? (yes/no) 1 2 4 3 Can this obtuse angle have a measure of 88' ? (yes/no) Are angles 1 and 2 adjacent angles? (yes/no) Are angles 2 and 4 congruent? (yes/no) 4 1 3 2 Is angle 2 congruent to angle b ? Are angles d and c adjacent? 1 4 3 2 a d c (yes/no) b Fill in all of the correct vertical angles 1 1, 4, 4 2 3 a d b c d, a, |