An obtuse or a scalene triangle would have angles of the given sizes
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The 3 interior angles of a right angle triangle add up to 180 degrees and so:- If: x+15+2x+90 = 180 Then: 3x = 75 and so x = 25 Therefore the largest acute angle is 2x = 50 degrees Check: 45+55+90 = 180 degrees
4140Improved Answer:-Exterior angles = 360 degreesInterior angles = 4140 degrees
There are (25-2)*180 = 4140 degrees
Scalene
If the two expressions given for the vertex angle are to be the same number, 6x + 8 = 9x -25; then 3x = 25 + 8 = 33 and x = 11. Therefore, the vertex angle is 6(11) + 8 = 74. The two base angles of an isosceles triangle must be the same and the three angles of the triangle must sum to 180. Therefore, calling the unknown base angle y, 2y + 74 = 180, or y equals 53.