In Fig.20, `O E` is the bisector of `/_B O Ddot` if `/_1=70^0,` find the magnitudes of `/_2,\ /_3\ a n d\ /_4.`

ABC is a triangle in which /_A=72^(0), the internal bisectors of angles B and C meet in O. Find the magnitude of /_BOC.

ABC is a triangle in which /_A=72^(0), the internal bisectors of angles B and C meet in O.Find the magnitude of /_BOC

If Figure, /_A O F\ a n d\ /_F O G form a linear pair. /_E O B=\ /_F O C=90^(00)a n d\ /_D O C=\ /_F O G=\ /_A O B=30^0 Find the measure of /_F O E ,\ /_C O B\ a n d\ /_D O Edot Name all the right angles. Name three pairs of adjacent complementary angles. Name three pairs of adjacent supplementary angles. Name three pairs of adjacent angles.

In Fig 66, l in e\ l m ,\ /_1=120^0\ and /_2=100^0, find out /_3\ a n d\ /_4.

In Fig.70. if\ l m n\ a n d\ /_1=60^0, find /_2.

In Fig.81, side B C of A B C has been produced to D and C E B Adot If /_A B C=65^0,\ /_B A C=55^0, find /_A C E ,\ /_E C D\ a n d\ /_A C Ddot

in fig.triangle AOB with coordinates of A and O as (4,0) and (0,0),AB=5. find the coordinates of B

In ABC,/_A=50^(@),/_B=70^(0) and bisector of /_C mets AB in D .find the angles of the triangle ADC and BDC .

In ABC,/_A=60^(@),/_B=80^(0) and the bisectors of /_B and /_C meet at O. Find : (i) /_C( ii) /_BOC .