Answer:
(8,2), (12,2),(10,10)
Step-by-step explanation:
any coordinate that means the two sides will have the same length
first, we know that the length is twice the amount of the width
so any coordinate we pick must be twice the length
pick a coordinate that is quite high up ( so we don't get into negatives)
so let's say (10,10)
then we want to go a positive number down - don't want to deal with fractions.
so e.g 8
so 6 down would be (10,2)
then the width is half the length so it has a 4cm wide base
and put an equal amount on each side to the left and the right to get the base co-ordinates
to the left : (8,2)
plus to the right: (12,2)
2+2= make a 4cm base
put these coordinates together and presto! you have coordinated proofs!