What fraction of 16 is 12?
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Name the quadrilaterals that have four equal sides.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?