Categories If lateral faces are If lateral faces are isosceles triangles rectangles then the then the shape is a shape is a right prism
. right pyramid.
Counterterrorism is the right prism
through which to approach this, rather than all-out war, but it's unlikely to destroy the Islamic State any more than it did the Taliban or militancy in Yemen.
One way to imagine Pythagoras' theorem in a third dimension is to extend the right-angled triangle (with hypotenuse c and legs a and b) into a right prism
of length l, the squares on the sides of the triangle becoming cuboids on the faces of the prism as shown in Figure 1, where the right-angled triangle is shown in black.
We had a class discussion about the difference between a right prism
, in which the lateral faces are perpendicular to the bases, and an oblique prism.
Slightly tweaking the collimation screws of the right prism
quickly fused the pair of images into good rough alignment.
(16,17) Base right prisms
, for example, shift the perception of space to the left; this shifts the head and body alignment towards the left side.