First, the bottom surface

One side, one side

high

(2). Bottom circumference

high

(3)、200.96

30 1.44

40 1.92

(4).75.36

(5)20

、2.3

、5000、5、840、34

(6) 15

(7)50.24

(8)2 1

、7

(9) 18.84

( 10)80

Second, x

√

×

√

×

Three. 1, 2, 3, 1, 1

(1)722.2 square centimeters

1 105.28 cm2

(2), 628 cubic centimeters

75.36 cubic centimeters

(3)785 cubic centimeters

You do the rest yourself. Doing it yourself is better than copying it, because you know more.