The first one
this is random stuff to fill up the 20 character minimum
Answer:4
Step-by-step explanation: Because 4 goes in 3/4 better and more eqvilent to that answer.
I estimated to 45 then divided 21 and got about 2.1
9514 1404 393
Answer:
24 cm²
Step-by-step explanation:
To find the area of the trapezium, we must know the length CD. That means we must know the length BC. Fortunately, the perimeter of ABCF is given, so we have ...
P = 2(AB +BC)
BC = (P/2) -AB = (20 cm)/2 - 6 cm = 4 cm
Then CD is ...
CD = BD -BC = 9 cm -4 cm = 5 cm
The area of the trapezium is given by the formula ...
A = (1/2)(b1 +b2)h
A = (1/2)(5 cm + 3 cm)(6 cm) = 24 cm²
The area of trapezium CDEF is 24 cm².
if four points are collinear, that are also coplanar: This is true
If points lie in the same line. they must lie in the same plane
