In Fig.39, `A O=O B` and`/_A=/_Bdot` Is`DeltaA O C~=DeltaB O D ?` State the matching pair you have used, which is not given in the question. Is it true to say that`/_A C O=/_B D O ?`

In Fig.37, A D bisects /_A and A D_|_ B Cdot IsDeltaA D B~=DeltaA D C ? State the three pairs of matching parts you have used in (i) Is it true to say that B D=D C ?

DeltaA B C is isosceles with A B=A Cdot A D is the altitude from A on B Cdot Is DeltaA B D~=DeltaA C D ? State the pairs of matching parts you have used to answer (i). Is it true to say that B D= D C ?

In Figure, A B C D is a rectangle in which diagonal A C is produced to Edot If /_E C D=146^0, find /_A O B

The diagonals of quadrilateral A B C D ,A C and B D intersect in Odot Prove that if B O=O D , the triangles A B C and A D C are equal in area. GIVEN : A quadrilateral A B C E in which its diagonals A C and B D intersect at O such that B O = O Ddot TO PROVE : a r( A B C)=a r( A D C)

In Fig. 7.8, O A" "=" "O B a n d" "O D" "=" "O C . Show that (i) ( i i ) (iii)DeltaA O D~=DeltaB O C (iv) (v) and (ii) ( v i ) (vii) A D" "||" "B C (viii) (ix)

In a quadrilateral A B C D , given that /_A+/_D=90o . Prove that A C^2+B D^2=A D^2+B C^2 .

In Fig.90, A O B is a straight line and the ray O C stands on it. The value of x is (a) 16 (b) 26 (c) 36 (d) 46

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

In Fig. 10.36, A,B and C are three points on a circle with centre O such that /_B O C""=" "30^o and /_A O B" "=" "60^o . If D is a point on the circle other than the arc ABC, find /_A D Cdot