Answer:
The answer is a=4/5b
Step-by-step explanation:
4(a+b)=9a
4a+4b+-9a=9a+-9a
-5a+4b=0
-5a+4b+-4b=0+-4b
-5a=-4b-
-5a/-5=-4b/-5
a=4/5b
1.8 is the <em>h</em> of the rhombus
A
answer is point d. circumcentre is the center of the circle inscribed inside the triangle
