小正方形的边长为1,因此AB = √(1² 3²) = √10因此中央边长为√10,周长为4√10面积两种算法:边长平方为√10 x √10 = 10大正方形 - 4个三角形 = 4 x 4 - 4 x (1 x 3 / 2) = 16 - 6 = 10√2²= √2 x √2= 2(2√2)³= (2√2) x (2√2) x (2√2)= (2 x 2 x 2) x (√2 x √2 x√2) {由上题 √2 x √2 = 2}= 8 x (2 x √2)= 16√2[-2√2]³ = (-2√2) x (-2√2) x (-2√2)= [-1 x (2√2)] x [-1 x (2√2)] x [-1 x (2√2)]= (-1) x (-1) x (-1) x (2 x 2 x 2) x (√2 x √2 x√2) {由上题 (2 x 2 x 2) x (√2 x √2 x√2) = 16√2}= 1 x (-1) x 16√2= -16√2π的三次方 = π的立方π的三次方的立方根 = π。 。