Answer:
Step-by-step explanation:
∠PQT = 35 + 25 {Exterior angle property of triangle}
= 60°
In ΔQNT,
TN = TQ
Therefore, ∠TNP = ∠PQT {Angles opposite to equal sides are equal}
∠TNP = 60°
∠TNP + ∠MNT = 180° {Linear pair}
60 + ∠MNT = 180
∠MNT = 180 - 60 = 120°
∠MNT = 120°
MR = 4 + 6 + 6 + 4 = 20
