Question1. Which of the following measures of three angles can be those of a triangle? 1) $40^{\circ}, 60^{\circ}, 80^{\circ}$ 2) $90^{\circ}, 60^{\circ}, 20^{\circ}$ 3) $100^{\circ}, 80^{\circ}, 50^{\circ}$ 4) $40^{\circ}, 80^{\circ}, 90^{\circ}$
2. The measures of the four angles of a quadrilateral are in the ratio of 12.3:4. What is the measure of the greatest angle of quadrilateral? 1) $144^{\circ}$ 2) $135^{\circ}$ 3) $125^{\circ}$ 4) $150^{\circ}$
3. Difference between two complementary angles is $10^{\circ}$. Calculate the vatues of both angles. 1) $45^{\circ}, 45^{\circ}$ 2) $40^{\circ}, 50^{\circ}$ 3) $50^{\circ}, 60^{\circ}$
4. What is the next row of numbers? 4) $100^{\circ}, 10^{\circ}$ \begin{tabular}{|l|l|l|} \hline 48 & 144 & 192 \\ \hline 38 & 114 & 152 \\ \hline 28 & 84 & 112 \\ \hline \end{tabular} 1) $18 \quad 54 \quad 72$ 2) $58 \quad 184 \quad 244$ 3) $68 \quad 204 \quad 272$
5. If $\angle 1=135^{\circ}, \angle 4=45^{\circ}$. Then, find $\angle 2$ and $\angle 3$, respectively 4) $68 \quad 214 \quad 292$ 1) $145^{\circ}, 35^{\circ}$ 2) $130^{\circ}, 50$ 3) $140^{\circ}, 40$ 4) $45^{\circ}, 135^{\circ}$
6. A quadrilateral $A B C D$ is inscribed in a circle. If $A B$ is parallel to $C D$ and $A C=B D$, then the quadrilateral must be a 1) parallelogram 2) rhombus 3) trapezium - 4) None of these
7. Which of the following is true if $\mathrm{PQ}=\mathrm{RS}$ ? 1) $P Q+Q R=R S$ 2) $P R=Q S$ 3) $P Q+Q S=R S$ 4) $P Q-R S=Q R$