Question 1 :
In $\triangle ABC$ and $\triangle DEF$, $\angle B=\angle E,AB=DE,BC=EF$. The two triangles are congruent under ............. axiom.

Question 2 :
In a triangle $ABC$, $\angle A={ 40 }^{ o }$ and $AB=AC$, then $ABC$ is ............ triangle.

Question 3 :
If $\Delta ABC \cong \DeltaDEF$ by SSS congruence rule then :

Question 4 :
In $\Delta ABC$, AB = AC and AD is perpendicularto BC. State the property by which $\Delta ADB\, \cong\,\Delta ADC$.

Question 5 :
If two angles and a side of a triangle are equal to two angles and a side of another triangle, then the triangles are congruent.

Question 6 :
Assertion: Two triangles are said to be congruent if two sides and an angle of one triangle are respectively equal to the two sides and an angle of the other. Reason: Two triangles are congruent if two sides and the included angle of the one must be equal to the corresponding two sides and included angle of the other.<br>Which of the following options hold?

Question 7 :
If two sides and one angle of a triangle are equal to the two sides and angle of another triangle, then the two triangles are congruent.

Question 8 :
If $\triangle$ $ABC$ $\cong$ $\triangle$ $PRQ$, then $\angle$ $B$ and $PQ$ are respectively equal to

Question 9 :
If $\triangle ABC\cong \triangle PQR$, $\angle B={ 40 }^{ 0 }$ and $\angle C={ 95 }^{ 0 }$, find $\angle P$.

Question 10 :
In an acute angled triangle $ ABC $, the internal bisector of angle $ A $&#160;meets base $ BC $&#160;at point $&#160;D $.&#160;$&#160;DE &#160;\perp &#160;AB&#160;$ and&#160;$&#160;DF \perp AC&#160;$; then the traingle $&#160;AEF&#160;$&#160;is an isosceles triangle