Current location - Loan Platform Complete Network - Foreign exchange account opening - (20 1 1? Newspeak pattern 2) as shown in figure 1, in the right-angled trapezoidal ABCD, AD∨BC, ∠ ABC = 90, E, F are points on the sides of AD and BC, EF∨AB, AD respectively.
(20 1 1? Newspeak pattern 2) as shown in figure 1, in the right-angled trapezoidal ABCD, AD∨BC, ∠ ABC = 90, E, F are points on the sides of AD and BC, EF∨AB, AD respectively.
(ⅰ)∵CF∨DE，FB∨AE，BF∩CF=F，AE∩DE=E

∴CBF∑DAE, BC again? Surface CBF,

So BC∑ plane DAE

(ii) take the midpoint h of AE and connect it with DH,

Ef ⊥ ea ∴ ef ⊥ ef ∵ ed planar DAE

DH again? Aircraft DAE∴EF⊥DH,

∵AE=ED=DA=2∴DH⊥AE,DH=3

∴DH⊥ Facing AEFB,

Therefore, the volume v of the AEFB pyramid is 13× 3× 2× 2 = 433.

Related articles
  • Kaiyuan international foreign exchange company
  • What does 500,000 U mean?
  • What should geography recite in the second day of junior high school?
  • Who succeeded in fighting on all sides?
  • Is the effect of dhv anthocyanin mask really that good? What is the most profitable thing to do WeChat business now?
  • The foreign exchange money has not arrived since it was returned.
  • How to convert the purchased foreign exchange into RMB?
  • Topic B: "Golden Decade" Insurance and Financial Management
  • Rice starts at the ground, and millions of tons of grain are stranded in the port.
  • Dong Hao foreign exchange exchange

    • copyright 2024 Loan Platform Complete Network All rights reserved