I am assuming 20mm = breadth and 11mm = height
Ar of Triangle = 1/2 x b x h
= 1/2 x 20 x 11
= 110mm^2
7+d=19 is the answer
subtract 7 from each side d=19-7
d=12
Answer:
a kite
Step-by-step explanation:
because the question asks what special quadrennial is formed by connecting the midpoints
