Line 1 and (1); Face; body
(2) the bottom surface; Round; High; One side, one side
(3) circle; Fan shape; Vertex; centre of a circle
(4) countless; Equality; one
(5) cylinder; High; Cone; high
Intelligent house
leave out
Activity angle
4. Length: 6×6 = 36m;; Width: 4× 6 = 24 (m); Height:12× 2 = 24m.
5.( 10- 1) × 1.5+20× 10 = 9× 1.5+200 = 13.5+200 = 2 13.5 (.