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r-ruslan [8.4K]
3 years ago
14

In equilateral ΔABC, AD, BE, and CF are medians. If FO = 4, then AE = A) 4 B) 4 3 C) 8 D) 12

Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0

Answer:

Your answer choice would be C) 8.

Step-by-step explanation:

vampirchik [111]3 years ago
5 0

Firstly, we need to draw triangle

we know that

O is a centroid

and centroid divides median into 2:1

so,

\frac{CO}{FO} =\frac{2}{1}

we have FO=4

so, we can plug it

\frac{CO}{4} =\frac{2}{1}

CO=8

now, we can find CF

CF=OC+FO

CF=8+4

CF=12

now, we can see triangle ACF is a right angled triangle

so, we can use pythagoras theorem

x^2=(\frac{x}{2} )^2+12^2

now, we can solve for x

\frac{3x^2}{4}=144

x^2=192

x=8\sqrt{3}

Since, it is equilateral triangle

so,

AC=x=8\sqrt{3}

we know that

E is a mid-point

so,

AE=\frac{AC}{2}

now, we can plug values

AE=\frac{8\sqrt{3}}{2}

AE=4\sqrt{3}................Answer


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Help<br><br> Determine which equation is parallel to line jk and which is perpendicular to line jk.
alukav5142 [94]

Answer:

5x + 3y = 13 parallel.

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Step-by-step explanation:

Two lines with slopes m_1 and m_2 are parallel when m_1=m_2 and are perpendicular when m_1*m_2=-1

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Can someone please help me? :(
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Answer:

____________________________________

\large{ \tt{ \star \: S \: O \: L \: U \: T \: I \: O \: N : }}

\large{ \boxed{ \tt{♡ \: VOLUME \:  = l \:  \times b  \:  \times h}}}

\longrightarrow \: 4 \frac{1}{3}  \times 3 \frac{1}{3}  \times 4

\longrightarrow \:  \frac{13}{3}  \times  \frac{10}{3}  \times 4

\longrightarrow \:  \frac{540}{9}

\longrightarrow \tt \: 57 \frac{7}{9}  \: ft ^{3}

  • Our final answer is 57 7 / 9 ft^3 .

- HappY LearninG ^_________^

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