In figure OA. OB= OC. OD
Show that `angle A= angle C and angle B= angle D`

In Delta ABC " and " Delta DEF, angle A = angle E and angle B = angle F . Then AB : AC is ……..

In the adjacent figures, If angle1 = angle3, angle2 = angle4 and angle3 = angle4 write the relations between angle1 and angle2 using an Euclid's postulate.

In the adjacent figure, ABC is a right angled triangle with right angle at B and points D, E trisect BC. Prove that 8AE^(2)=3AC^(2)+5AD^(2).

Show that the angle bisectors of a triangle are concurrent.

Find the angle A in triangle ABC, if angle B=60^∘ and angle c=70^∘

In a triangle ABC, D is a point on BC such that AD is the internal bisector of angle A . Let angle B = 2 angle C and CD = AB. Then angle A is

In Delta ABC and Delta XYZ , "if " angle A and angle X are acute angles such that cos A =cos X then show that angle A = angle X

The points (0,8/3),(1,3) , and (82 ,30) are the vertices of (A) an obtuse-angled triangle (B) an acute-angled triangle (C) a right-angled triangle (D) none of these

In the adjacent figure BE bot DA and CD bot DA then prove that m angle1 ~= m angle3 .