Answer:
100 cm
Step-by-step explanation:
The formula to answer this question is base x height divided by 2. All you have to do is substitute: 10x20= 200 divided by 2 is 100.
It is fourteen and two/thirds if im right
Looks like D to me but i could be wrong. Did you try image reversing?
Because it is a square all sides are equal so all sides are 20.25 because half of 81 is 40.5 and half of that is 20.25.