28.Josie's picture whose side measures 10 cm and is placed in a trapezoidal frame whose measures 30 cm and 40 cm. The height is 5 cm. What is the area not covered by the picture?
A.375 cm B.175 cm C.100 cm D.75 cm
29.A triangular playground measures 15 m by 10 m. In the center ,a children's playground occupies an area of 40 m.What is the area around the children's playground?
A. 150m B.75m C.40m D.35m
30.Dr. De Guzman's office has a rectangular tv rack measuring 2 m by 3.2 m in one corner. If his office is 6.5 m by 5.2 m. How much space is uncovered?
A.40.2 m
B.33.8 m
C.27.4 m
D.6.4 m​