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Suggest two reasons why irrigation is important for human development of the desert (4 marks)

(10 points) 1. cone 2. rectangle 3. triangle 4. circle 5. cylinder a. perpendicular cross section of a pyramid b. perpendicular cross section of a cylinder c. parallel cross section of a sphere d. shape created when a rectangle is rotated about the y-axis e. shape created when a right triangle is rotated about the y-axis

Find the volume of 3, 8 and one third and 10 and 2 over 5