010324
010324 010324
  • 09-10-2021
  • Mathematics
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the diagram shows a ABCDEF 70× 90cm

the diagram shows a ABCDEF 70 90cm class=

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Аноним Аноним
  • 09-10-2021

Solution :

Tan 25° =  C4/BC

=> 0.466 = CF/60

=> C4 = 27.96

A4² = AC²  + C4²

AC² = 60² + 40² = 5200

CF² = 781.76

4F² =  5200 +  781.76

=> AF² =5981.76

=> A4 = 77.3

length A4  = 77.3  cm

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