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What number produces an irrational number when multiplied by -1.25

Two lines parallel to a third line are parallel to each other. always sometimes or never

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?