Special Properties, SMB-026 A pentagon is pictured below, where one internal angle is a right angle. What is the value of `x`? (3 marks) --- 6 WORK AREA LINES (style=lined) --- Show Answers Only `130^@` Show Worked Solution `y^{\circ}=180-100 = 80^{\circ}\ \ \text{(180° in straight line)}` `text{Sum of exterior angles = 360°}` `z^{\circ}` `=360-(70+70+90+80)` `=360-310` `=50^{\circ}` `:.x^{\circ}=180-50 = 130^{\circ}\ \ \text{(180° in straight line)}`