1. Czy podane zdania są prawdziwe? Wstaw znak X w odpowiednią kratkę. Pole prostokąta o wymiarach 7 dm × 12 dm jest większe niż 80 dm2 . TAK NIE Prostokąt o wymiarach 2 cm × 3 cm ma mniejsze pole niż pro- stokąt o bokach 1,5 cm i 5 cm. TAK NIE 2. Jeden z boków prostokąta ma 10 cm, a drugi jest 2 razy krótszy. Pole tego prostokąta wynosi: A. 5 cm2 B. 30 cm2 C. 40 cm2 D. 50 cm2 3. Pole kwadratu wynosi 25cm2 Oblicz długość boku tego kwadratu. 4. Oblicz pole prostokąta o bokach długości 4 cm i 12 cm. 5. Pole prostokąta wynosi 154 cm2, a jeden z jego boków ma 7 cm. Oblicz obwód tego prostokąta. 6. Oblicz pole kwadratu o obwodzie 18 dm. 7. Oblicz pole prostokąta, którego jeden bok ma 7 dm, a drugi jest od niego o 3 dm dłuższy. 8. Jeden bok prostokąta ma 8 cm, a jego pole wynosi 56 cm2 Oblicz długość drugiego boku tego prostokąta.

Step-by-step explanation:

Here is english version so someone else can solve it

1. Are the given sentences true? Put an X in the appropriate box. The area of the 7 dm × 12 dm rectangle is greater than 80 dm2. YES NO A 2 cm × 3 cm rectangle has a smaller area than a 1.5 cm and 5 cm rectangle. YES NO 2. One of the sides of the rectangle is 10 cm and the other is 2 times shorter. The area of this rectangle is: A. 5 cm2 B. 30 cm2 C. 40 cm2 D. 50 cm2 3. The area of the square is 25 cm2. Calculate the side length of this square. 4. Calculate the area of the rectangle with sides 4 cm and 12 cm long. 5. The area of the rectangle is 154 cm2 and one of its sides is 7 cm. Calculate the perimeter of this rectangle. 6. Find the area of the square with a circumference of 18 dm. 7. Calculate the area of the rectangle with one side 7 dm longer and the other side 3 dm longer. 8. One side of the rectangle is 8 cm and its area is 56 cm2. Calculate the length of the other side of the rectangle.

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system