# In a trapezium PQ

Let us consider trapezium PQRS with PQ||RS.

According to the problem, it is given that P = 700and Q = 800. We know that the sum of adjacent angles between two parallel lines is 1800.

i.e, P + S = 1800 ...... - - (1)

Q + R = 1800. ...... - (2)

Substituting the value of P in eq(1) we get,

700 + S = 1800

S = 1800 - 700

S = 1100.

Substituting the value of Q in eq(2) we get,

800 + R = 1800

R = 1800 - 800

R = 1000.

The values of S and R is1100 and 1000.

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