Lines g, h, and l are parallel and m ∠ 1 = 52°.

What is m ∠ 11?

M∠1 and m ∠4 are equal because they are vertical.

m ∠4 and m ∠ 8 are equal because they are corresponding.

m ∠8 and m ∠12 are equal because they are corresponding.

m ∠12 and m∠11 are supplementary, so the m ∠11 must be equal to 128 degrees.