Which is the best definition of a trapezoid? a. a parallelogram that can have 2 equal sides b. a parallelogram with no equal sides c. a quadrilateral with no equal angels d. a quadrilateral with 1 pair of parallel sides

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.