Q7 of 115 Page 8

In Fig. 8.122, AOB is a straight line. If ∠AOC +∠BOD = 85°, then ∠COD =

Given,

AOB = Straight line

∠AOC + ∠BOD = 85^o

∠AOC + ∠COD + ∠BOD = 180^o (Linear pair)

85^o + ∠COD = 180^o

∠COD = 95^o

Consider the following statements:

When two straight lines intersect:

(i) 0Adjacent angles are complementary

(ii) Adjacent angles are supplementary.

(iii) Opposite angles are equal.

(iv) Opposite angles are supplementary.

Of these statements

Given ∠POR = 3x and ∠QOR =2x+10°. If ∠POQ is a straight line, then the value of x is

In Fig. 8.123, the value of y is

In Fig. 8.124, if = 5 and = 4, then the value of x is