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− | <asy>
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− | size(288);
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− |
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− | pair A, B, C, D;
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− | A = (0,0); B = (5,0); C = (7,4); D = (2,4);
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− | draw((-1,0)--(8,0)); draw((-1,4)--(8,4)); draw((-1,-2)--(3,6)); draw((4,-2)--(8,6));
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− | draw((-1,-4/7)--(8,32/7)); draw((13/2,-2)--(1/2,6));
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− |
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− | dot(A); dot(B); dot(C); dot(D);
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− | label("$A$",A,NW); label("$B$",B+(0,-1/5),S); label("$C$",C,SE); label("$D$",D+(0,1/5),N);
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− |
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− | label("$64^\circ$",D+(1/10,-1/2),S); label("$34^\circ$",(-7/10,-11/14));
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− | label("$x$",(5/2,15/4)); label("$y$",(25/4,15/4)); label("$z$",(3,2));
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− | </asy>
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− |
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| <asy> | | <asy> |
| size(216); | | size(216); |
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− | real e = 2.718281828459045235360287471352662497757247093699959574966967627724076630353;
| + | draw((0,10)--(0,0)--(10,0)); draw((5,10)--(0,0)--(10,5)); |
− | real pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286;
| + | label("$ct$",(0,10),N); label("$x$",(10,0),E); |
− | | + | label("$ct'$",(5,10),N); label("$x'$",(10,5),E); |
− | //xaxis(-1,5);
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− | //yaxis(-1,5);
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− | | |
− | //real f(real x) { return abs(x); }
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− | | |
− | draw((2,3)--(0,0)--(4,0),Arrows); draw((0,0)--(2,0),EndArrow); draw((2,0)--(2,3),dashed); draw(rightanglemark((4,0),(2,0),(2,3),4)); | |
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− | label("$\mathbf{a}$",(4,0),E); label("$\mathbf{b}$",(2,3),NE); label("$\mathbf{b}_{\parallel}$",(2,0),S); label("$\theta$",(0.3,0.1),NE); | |
− | | |
− | //limits((-1,-4),(6,6),Crop);
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− | </asy>
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− | | |
− | <asy>
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− | import three; import graph3;
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− | currentprojection=orthographic(4,-4,1);
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− | size(288);
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− | | |
− | //xaxis3("$A$",0,3);
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− | //yaxis3("$A'$",0,3);
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− | zaxis3("$\hat{\mathbf{n}}$",0,1);
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− | | |
− | draw((3,0,0)--(0,4,0)--(-3,0,0)--(0,-4,0)--cycle); draw((1,0,1)--(0,0,0)--(1,0,-1)); draw((0,0,0)--(1,0,0)); draw((1,0,1)--(1,0,-1),dashed);
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− | label("$\mathbf{x}$",(1,0,1),E); label("$\mathbf{x}'$",(1,0,-1),E); | + | dot((0,3),blue); dot((3,6),blue); draw((0,3)--(3,6),blue); |
| + | label("$ct_1$",(0,3),W,blue); label("$ct_2'$",(3,6),NW,blue); |
| </asy> | | </asy> |