The measures of the three angles of a triangle form an arithmetic sequence. What must be the measure, in degrees, of the other two angles, if one angle is 90 degrees?
+204 Guest is right, 30, 60, 90 is the answer.
180 - 90 = 90
The two other angles have to equal 90 degrees and form an arithmetic sequence. 30, 60, 90 is the only sequence that fits both conditions.
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