1. The basis of a prism that has 12 edges is:
A. triangle
B. square
C. dodecahedron
D. hexagon

2. The heptagonal pyramid has:
A. 7 edges, 7 vertices, 7 walls
B. 14 edges, 1 vertex, 8 walls
C. 21 edges, 14 vertices, 9 walls
D. 14 edges, 8 vertices, 8 walls

3. The sum of all edges of the triangular prism with a base edge of 4 cm and a side edge of 5 cm is:
A. 36 cm
B. 72 cm
C. 39 cm
D. 27 cm

4. 20 liters of water will fit in an aquarium with dimensions:
A. 500 mm × 200 mm × 150 mm
B. 30 cm × 40 cm × 20 cm
C. 2.5 dm × 2.5 dm × 2.5 dm
D. 0.3 m × 40 cm × 1 dm

5. The diagonals of a 12-cm rectangular prism are 13 cm and 15 cm long. The diagonal lengths of the base of this prism differ by:
A. 1 cm
B. 4 cm
C. 2 cm
D. 0 cm

6. The edge of a tetrahedron with a total area of 49 dm2 is:
A. about 22 cm
B. 7 cm
C. 7 dm
D. 49 dm