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•  Question 1: 1 pts $d = a\sqrt{2}$ is a diagonal of a square.
•  Question 2: 1 pts Which formula can be used to find the perimeter of the quadrilateral shown on the picture?
 $P=a \cdot b \cdot c \cdot d$ $P=a+b+c+d$ $P=a\cdot b+c\cdot d$ none of these
•  Question 3: 1 pts Area of parallelogram = $\dfrac{\mbox {base$\times$height}}{2}$ = $\dfrac{b\cdot h}{2}.$
•  Question 4: 1 pts Area of rhombus = $\dfrac{d_{1}\cdot d_{2}}{2}.$
•  Question 5: 2 pts Which of the following expression is NOT correct?
•  Question 6: 1 pts Is the folowing expression true or false? $$\theta = 90^{\circ}$$
•  Question 7: 2 pts Area of Isosceles Trapezoid = $\dfrac{(a+b)\cdot h}{2}.$
•  Question 8: 2 pts Which formula can be used to find the altitude of the quadrilateral shown on the picture?
$h^{2}=$
•  Question 9: 3 pts Which formula can be used to find the diagonal $d$ of the quadrilateral shown on the picture?
•  Question 10: 3 pts Which formula can be used to find the circumradius $R$ of the quadrilateral shown on the picture?
$R=$
•  Question 11: 3 pts Is the folowing expression true or false? $$d_{1}=a$$
•  Question 12: 3 pts Is the folowing expression true or false? $$r=\dfrac{x}{2}$$