The fig.16 has been obtained by using two triangles. Find `/_A+/_B+/_C+/_D+/_E+/_Fdot`

Fig.17 is made up of two triangles. find /_D A B+/_A B C+/_B C D+/_C D Adot

In the six cornered figure, (fig.20), AC,AD and AE are joined. Find /_F A B+/_A B C+/_B C D+/_C D E+/_D E F+/_E F Adot

In five cornered fig. 18, A D , A C are joined. Find /_E A B+/_ A B C+/_B C D+/_C D E+/_D E A .

In Figure, A is the centre of the circle. A B C D is a parallelogram and C D E is a straight line. Find /_B C D\ :\ /_A B Edot

In fig.30, find (i) /_A C D , (ii) /_A E D

The sides B C ,\ C A\ a n d\ A B\ of a triangle A B C , are produced in order, forming exterior angles /_A C D ,\ /_B A E\ a n d\ /_C B Fdot Show that /_A C D+\ /_B A E+\ /_C B F=360^0

Two triangles are congruent if two sides and the included angle of one are equal to the corresponding sides and the included angle of the other triangle. GIVEN : Two triangles A B C and D E F such that A B=D E ,A C=D F and /_A=/_D PROVE : A B C~= D E F Figure

A , B , C are the three angles of a triangle. If A-B=15^@,\ B-C=30^@, find /_A ,\ /_B\ a n d\ /_C

The sides B C ,C A and A B of a triangle A B C , are produced in order, forming exterior angles /_A C D ,/_B A E and /_C B F . Show that /_A C D+/_B A E+/_C B F=360^0

The sides B C ,C A and A B of a triangle A B C , are produced in order, forming exterior angles /_A C D ,/_B A E and /_C B F . Show that /_A C D+/_B A E+/_C B F=360^0