M∠1 + m∠RPQ + m∠5 = 180° Definition of a Straight Angle
proof : mes1= PRQ (alternate interior)
RPQ = 3 Opposite angle (vertex)
5 =Q (alternate interior)
PRQ + RPQ + RQP = 180
<span>No, because postulates are assumptions. Some true, some not. So it can't be used to prove it</span>
Answer:
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Step-by-step explanation:
Not sure about this but, is it a line?
The third angle would be 100 degrees
Explanation: 360-85-115-60= 100
