In a right angled triangle oab, ob: ab=7: 4 and oa is the longest side of the triangle. triangle oab is rotated about the point o to form trriangke oa'b' such that aoa' is a straight line. find obtuse angle a'ob

From the description

If we rotate so AOA' is straight, that's a 180 degree rotation. So A'OB is the supplement of the above,

Answer (approximately): 150.26 degrees

step-by-step explanation:

c. side angle side. u shares the same sides