I hope this helps you
if B midpoint for AC than AB=BC=a
AB/AC=BF/CE
a/a+a =BF/90
a/2a=BF/90
1/2=BF/90
BF=90/2
BF=45
Answer:

Step-by-step explanation:
<u>Step 1: Multiply inside the parenthesis
</u>


<u>Step 2: Multiply
</u>
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Answer: 
Answer:
Step-by-step explanation:
Think it’s - 1/3 not sure tho