3. In Fig. 10.33, find x. Further find 4BOC, LCOD and ZAODl pairs11. I

1.	3. In Fig. 10.33, find x. Further find 4BOC, LCOD and ZAODl pairs11. In Fig. 10.40, ALDCA and 412. Given ZPORline. (Fig. 10.(x + 10)r+20°t 20。Fig. 10.33Fiq. 10.34
Answer» sum of angles AOD+DOC+COB = 180°... (linear pair) => x+10+x+x+20 = 180°=> 3x+30 = 180°=> 3x = 180-30 = 150°=> x = 150/3 = 50° now, angle AOD = x+10 = 60° angle DOC = 50°angle BOC = x+20 = 70°

3. In Fig. 10.33, find x. Further find 4BOC, LCOD and ZAODl pairs11. In Fig. 10.40, ALDCA and 412. Given ZPORline. (Fig. 10.(x + 10)r+20°t 20。Fig. 10.33Fiq. 10.34

Answer»

sum of angles

AOD+DOC+COB = 180°... (linear pair)

=> x+10+x+x+20 = 180°=> 3x+30 = 180°=> 3x = 180-30 = 150°=> x = 150/3 = 50°

now, angle AOD = x+10 = 60° angle DOC = 50°angle BOC = x+20 = 70°