In `triangleABC, angleA = 30^@`, `angleB=40^@` and `angleC=110^@`
In `trianglePQR, angleP = 30^@`, `angleQ= 40^@` and `angleR= 110^@`
A student says that `triangleABC ~=trianglePQR` by AAA congruence criterion. Is he justified? Why or why not?

In triangleABC , if angleA=55^@ , angleB=40^@ find angleC

If in two triangles triangleABC and trianglePQR , AB=QR angleA=angleQ and angleB=angleR , then triangleABCequiv…………….. .

In trianlges ABC and PQR, angleA=angleQ and angleB=angleR which side of trianglePQR should be equal to side AB of triangleABC so that the two trianles are congruent? Give reasons for your answer.

Below are given the measures of certain sides and angles of triangles. Identify those which cannot be constructed and, say why you cannot construct them. Construct rest of the triangles. Given That : Triangle trianglePQR Measurements mangleQ = 30^@, mangleR = 60^@ , QR = 4.7 cm.