Question

LEVEL
1. In Fig. 10.31, OA and OB are opposite rays:
(i) If x = 25°, what is the value of y? (ii)
С
(24+5)
3r
O
A
B
Fig. 10.31​

Answer 1

Answer:

y=50

Step-by-step explanation:

Given, x=25o => 3xo=75o

We know that ∠AOC,∠BOC are linear pairs of angles.y=

∴∠AOC+∠BOC=1800

(2y+5)o+3x0=180

2y+5+75=180                          [ ∵ 3xo=75o]        

2y+80=180                              

2y=180−80

y=2100

∴y=50∘

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