A high-toned concept combined with disagreeable characters and a jaded worldview provided the formula for Bruce Norris’ bracing retort to “A Raisin in the Sun,” “Clybourne Park,” the Pulitzer ...

The base and perpendicular height are at right angles. Showing that a parallelogram has the same area as a rectangle: Split the parallelogram into a right-angled triangle and a trapezium. Move the ...

Take any quadrilateral such as ABCD above. Construct the midpoints of each side and join them to form another quadrilateral EFGH. Varignon's Theorem asserts that the ...

THE objection to Duchayla's proof of the “parallelogram of forces” is, I suppose, admitted by all mathematicians. To base the fundamental principle of the equilibrium of a particle on the ...