QUESTION IMAGE
Question
- rectangle wxyz with vertices w(-3,-4), x(0,-5), y(-2,-11),
and z(-5,-10); 180° rotation about point x.
w (__,__)
x (__,__)
y (__,__)
z (__,__)
- triangle pqr with vertices p(-13,-3), q(-7,3), and r(-6,-2);
90° clockwise rotation about point r
Step1: Translate the point
To rotate a point \((x,y)\) \(180^{\circ}\) about a point \((a,b)\), we use the formula \((2a - x,2b - y)\).
For point \(W(-3,-4)\) and \(X(0,-5)\):
\(x=-3,y = - 4,a = 0,b=-5\)
\(W'(2\times0-(-3),2\times(-5)-(-4))=(3,-6)\)
Step2: For point \(X\)
Since we are rotating about \(X\), \(X'(0,-5)\) (a point rotated \(180^{\circ}\) about itself remains the same)
Step3: For point \(Y(-2,-11)\)
\(x=-2,y=-11,a = 0,b=-5\)
\(Y'(2\times0-(-2),2\times(-5)-(-11))=(2,1)\)
Step4: For point \(Z(-5,-10)\)
\(x=-5,y=-10,a = 0,b=-5\)
\(Z'(2\times0-(-5),2\times(-5)-(-10))=(5,0)\)
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\(W'(3,-6)\)
\(X'(0,-5)\)
\(Y'(2,1)\)
\(Z'(5,0)\)