State ASA congruency rule.

State SAS congruency rule.

State SSS congruency rule.

State RHS congruency rule.

Through construction we have seeri that SSS congruency rule hold. This theorem can be proved using a suitable construction.

Prove that triangleAOB~=triangleCOD by using SAS congruency rule.

Given below are measurements of some parts of two triangles. Examine whether the two triangles are congruent or not, using RHS congruence rule. {:(" "Delta ABC ," " Delta PQR ),(angle A = 90^(@) " ,AC = 5 cm, BC = 9 cm " ,angle Q = 90^(@) ", RP= 8 cm, PQ = 5 cm "):}

triangleABC~=triangle DBCby which congruency rule?

From the above sum triangleABC~=triangle RQP by which congruency rule?

BE and CF are two equal altitudes of a triangle ABC. Using RHS congruence rule, prove that the triangle ABC is isosceles.

triangleABC is an isosceles triangle in which AB = AC. Show angleB=angleC (Hint : Draw APbotBC) (Using RHS congruence rule)