TRIANGLE AREAS
by John South
from Sinclair User #29, August 1984

A simple way of finding the area of an irregular space is to divide
it into triangles and calculate the area of each triangle. A 4-sided
figure can be split easily into two triangles, a 5-sided into three,
and even curved areas can be split into triangles to get an 
approximation of the total size.

John South of Bexhill-on-Sea, Sussex sent a program which does just
that on the 1K ZX-81, which he uses to calculate how much 
fertiliser he needs for his lawn. You must divide a plan of the
area into triangles and measure each side. The program will ask 
you to INPUT each triangle in turn and at the end tells you the 
size of the total area.



PANIC
by Aaron Day
from Sinclair User #29, August 1984

PANIC by Aaron Day squeezes a fast-moving arcade game into the 1K
ZX-81. You must steer your helicopter through the obstacles and
land it on the mountain, using cursor keys 6 & 7 to control your
machine. Day has used a number of sophisticated space-saving
techniques to fit the program into the memory, including a short
machine code routine. You must enter that separately.

Type in line of the program, and then type the following:
POKE 16514,42 [NEWLINE]
POKE 16515,14 [NEWLINE]
POKE 16516,64 [NEWLINE]
POKE 16517,78 [NEWLINE]
POKE 16518,6  [NEWLINE]
POKE 16519,0  [NEWLINE]
POKE 16520,201[NEWLINE]
Then type in the rest of the program. You will see that the REM
statement contains a jumble of characters; that is the little
machine code routine.

Program Description
[not typed in yet]
