In Fig. 4.72, `A B C D` . If `O A=3x-19 ,\ \ O B=x-4` , `O C=x-3` and `O D=4` , find `x` . (FIGURE)

In Fig. A B||C D . If O A=3x-19 ,\ \ O B=x-4 , O C=x-3 and O D=4 , find x .

In Fig.4.72,ABCD. If OA=3x-19,quad OB=x-4,OC=x-3 and OD=4, find x.( FIGURE )

In Fig. 4.140, /_A B C=90o and B D_|_A C . If A B=5. 7 c m , B D=3. 8\ c m and C D=5. 4 c m , find B C . (FIGURE)

In Fig. 6.13, lines AB and CD intersect at O. If /_A O C\ +/_B O E=70^@ and /_B O D=40^@ , find /_B O E and reflex /_C O E .

In Fig. 6.13, lines AB and CD intersect at O. If /_A O C\ +/_B O E=70^@ and /_B O D=40^@ , find /_B O E and reflex /_C O E .

In Figure, lines A B\ a n d\ C D intersect at O . If /_A O C+\ /_B O E=70^0 and \ /_B O D=40^0, find /_B O E and reflex /_C O E

In Fig. 4.89, if E D C ~ E B A ,\ \ /_B E C=115o and /_E D C=70o . Find /_D E C ,\ \ /_D C E ,\ \ /_E A B ,\ \ /_A E B and /_E B A . (FIGURE)

In Fig. 4.97, if /_A=/_C , then prove that A O B ~ C O D . (FIGURE)

In a A B C , D and E are points on the sides A B and A C respectively such that D E B C If A D=4 , A E=8 , D B=x-4 , and E C=3x-19 , find x (ii) If A D=8 c m , A B=12 c m and A E=12 c m , find C E . (iii) If A D=4 c m , D B=4. 5 c m and A E=8 c m , find A C .