Answer:
A
Step-by-step explanation:
We know the following:

so the segment EF is equal to

and here we can do a trick :)

you see it's the same

now we plug the values given

so it's option A
Yes it is because if you multiply 3*3=9
then what you do on top you do on the bottom 10*3=30
Answer:
A=14cm²
Step-by-step explanation:
A=hbb
2=7·4
2=14cm²
I think it would be 12.207… use the Pythagorean theorem (a^2+b^2=c^2) so 10^2+7^2
100+49=149
Then take square root of 149 to undo the the squaring of c and it should be around 12.207 :)
Answer:
L
O
+
65.91828182
Step-by-step explanation: