Question

In Fig. 9.44, x + y =
A. 270
B. 230
C. 210
D. 190°

Answer 1

Answer:

Step-by-step explanation:

<BOD = 40 ( vertically opposite angles )

so <BOD + <ODB + <0BD =  180 ( angle sum property)

40 + 70 + <OBD = 180

110 + <OBD = 180

<OBD = 70

now, 70 + y = 180 (linear pair )

y= 110

now....

Answer 2

230

Step-by-step explanation:

we know that,

opposite inner angle =third exterior angle

aco°+aoc°=x

80°+40°=120°

angle aoc=bod (v.o.a)

bco°+bod°=y

70°+40°=110°

☆x+y=120°+110°=230°

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