-
qibla comp****es date back at
least to the 18th century. Some
recent versions use
digital readout instead of a
magnetic pointer. Some
qibla comp****es also...
- be
drawn either by
using again the
right triangular ruler, or by
using a
traditional straightedge and
comp**** construction. With a
similar construction...
- 10 is the
first non-trivial
centered triangular number and
tetrahedral number.
While 55 is the
tenth triangular number, it is also the
tenth Fibonacci...
- and 75° angles. They are
often purchased in
packs with
protractors and
comp****es. Less
commonly found is the
adjustable set square. Here, the body of the...
- Emil Reich,
which indicated army
movements by
curved lines, with
solid triangular arrowheads placed intermittently along the lines. Use of
arrow symbols...
-
right always mean left and
right and TO/FROM is
indicated by a
simple triangular arrowhead pointing to the VOR. If the
arrowhead points to the same side...
- both
equal 28; the
seventh triangular number and like 6 a
perfect number,
which also
includes 496, the thirty-first
triangular number and
perfect number...
- use of
space and
building materials. The
Voronoi diagram of a
regular triangular lattice is the
honeycomb tessellation of hexagons. It is not
usually considered...
- the
rigid comp**** and
collapsing comp****es are equivalent; what can be
constructed by one can be
constructed by the other, even in the
comp****-only construction...
-
double Mersenne prime,
following 7. On the
other hand, the thirty-first
triangular number is the
perfect number 496, of the form 2(5 − 1)(25 − 1) by the...