In Fig.7, `a=b=c ,` name the angle which is congruent to`/_A O C`

In Fig,8,/_AOC~=/_PYR and /_BOC~=/_QYR . Name the angle which is congruent to /_AOB .

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

In Fig. 15.98, A B C is a right angled triangle in which /_A=90o , A B=21\ c m and A C=28\ c m . Semi-circles are described on A B ,\ B C and A C as diameters. Find the area of the shaded region. (FIGURE)

If any two angles and a non-included side of one triangle are equal to the corresponding angles and side of another triangle, then the two triangles are congruent. GIVEN : Two s A B C and D E F such that /_A=/_D ,/_B=/_E ,B C=E F TO TROVE : A B C~=D E F Figure

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

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 .

Look at Fig. 2.34. Mark a point (a) A which is in the interior of both angle1 and angle2 . (b) B which is in the interior of only angle1 . (c ) Point C in the interior of angle1 . Now, state whether points B and C lie in the interior of angle2 also.

In fig.41, A B C is a right triangle right angled at Adot D lies on B A produced and D E_|_B C , intersecting A C at F . if /_A F E=130^0, find /_B D E (ii) /_B C A /_A B C

In Fig.92, A O B is a straight line such that /_A O C=(3x+10)^0,\ /_C O D=50^0 and /_B O D=(x-8)^0dot The value of x is (a) 32 (b) 36 (c) 42 (d) 52

In figure, ABC is triangle in which /_A B C > 90o and A D_|_C B produced. Prove that A C^2=A B^2+B C^2+2B C.B D .