nguyendangkhoi1

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Dịch bài toán sau và giải :
"Give a right triangle ABC (Â=90) with B =40 and the line d is a the midperpendicular of the segment BC . Suppose that d  AB = {E} , E of the segment BC . If BE=16 cm then the area of ABC is ... cm^2.
(round to three demical places in each step)
A . 256
B . 147,95
C . 128
D . 295,9

help me

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Lập quy trình ấn phím:

$$\sqrt[2]{2+3 \sqrt[3]{4+5 \sqrt[5]{6+...+29\sqrt[29]{30}}}}$$