Question : ΔABC and ΔDEF are congruent respectively. If AB = 6 = DE, BC = 8 = EF and $\angle$B = 30°, then $\angle$D + $\angle$C _________.

Option 1: 160°

Option 2: 120°

Option 3: 130°

Option 4: 150°

Question : In $\triangle$ABC and $\triangle$PQR, AB = PQ and $\angle$B = $\angle$Q. The two triangles are congruent by SAS criteria if:

Option 1: BC = QR

Option 2: AC = PR

Option 3: AC = QR

Option 4: BC = PQ

Question : In an isosceles $\triangle ABC$, $AB = AC$, $XY || BC$. If $\angle A=30°$, then $\angle BXY$?

Option 1: 75°

Option 2: 30°

Option 3: 150°

Option 4: 105°

Question : If in $\triangle$ XYZ, XY = 4 cm and XZ = 5 cm and Q is a point on YZ such that XQ bisects $\angle X$, then YQ : QZ is:

Option 1: 2 : 3

Option 2: 3 : 2

Option 3: 5 : 4

Option 4: 4 : 5

Question : If $x+y+z=0$, then what is the value of $\frac{x^2}{yz}+\frac{y^2}{xz}+\frac{z^2}{xy}$?

Option 1: $0$

Option 2: $\frac{1}{3}$

Option 3: $1$

Option 4: $3$