A robot is a machine thatcan help people do things that are impossible. It brings many benefits to the world, with intelligent applications that have been installed man-made. They can help you with housework, toys for kids, and so much more. In the future world, robots can replace people at work, from which factories, buildings, and buildings are all robots. But now the robot has not been fully used or can show themselves perfectly. All the depends on you, the people on this Earth. An imaginative mind, the intelligence, the exquisite it is every child, every fool

A robot is a machine thatcan help people do things that are impossible. It brings many benefits to the world, with intelligent applications that have been installed man-made. They can help you with housework, toys for kids, and so much more. In the future world, robots can replace people at work, from which factories, buildings, and buildings are all robots. But now the robot has not been fully used or can show themselves perfectly. All the depends on you, the people on this Earth. An imaginative mind, the intelligence, the exquisite it is every child, every fool

bn tự vẽ hình hộ mình nha

a, Xét tam giác CKA và tam giác CAB có
   góc C chung 
   góc BAC= góc AKC (=90 độ)
=> tam giác CKA đồng dạng với tam giác CAB
b, vì tam giác CKA đồng dạng với tam giác CAB
=>CA/BC=CK/CA
=>CA^2=BC.CK( ĐPCM)
c,
áp dụng định lý py-ta-go vào tam giác ABC vuông tại A
BA^2+AC^2=BC^2
=>36+64=BC^2
=>BC=10 cm
Xét tam giác ABC 
AB/AE=BC/CE
=>6/AE=10/8-AE
<=>6(8-AE)=10AE
<=>48-6AE-10AE=0
<=>-16AE=-48
<=>AE=3
=>AC-AE=CE
<=>8-3=CE
<=>CE=5

4-\(\dfrac{13}{8}\)=\(2\dfrac{3}{8}\)

D