2. Construct a quadrilateral \( P Q R S \) which \( P R=10 \mathrm{~cm} \) and \( P R=2 P Q \). Also, \( \triangle P R S \) is an equilateral trangle and \( \angle Q=90^{\circ} \). (Hint: Construct \( \triangle P R S \). With \( P R \) as diameter, construct a semicircle. Find \( Q \) on this semicircle.)
3. Construct a quadrilateral \( A B C D \) where \( A B=4.5 \mathrm{~cm}, B C=4 \mathrm{~cm}, C D=3.9 \mathrm{~cm}, A D=3.2 \mathrm{~cm} \) and \( \angle B=70^{\circ} \).
4. Construct a quadrilateral \( P Q R S \) where \( P Q=4 \mathrm{~cm}, Q R=6 \mathrm{~cm}, \angle P=60^{\circ}, \angle Q=90^{\circ} \) and \( \angle R=120^{\circ} \).
5. Construct a quadrilateral \( A B C D \) where \( B C=5 \mathrm{~cm}, A D=5.5 \mathrm{~cm}, C D=4.5 \mathrm{~cm}, A C=7 \mathrm{~cm} \) and \( B C=5.5 \mathrm{~cm} \)