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ABC is the middle line of MN in an equilateral triangle. If AB = 8 cm, then find the perimeter MBN.
A)18 cm B)24 cm C)16 cm D)20 cm E)12 cm​..

ABC is the middle line of MN in an equilateral triangle If AB 8 cm then find the perimeter MBN A18 cm B24 cm C16 cm D20 cm E12 cm class=

Respuesta :

Answer:

the answer is 12

Step-by-step explanation:

since the triangle is equilateral meaning all side of ABC is equal to each other AB= BC = AC= 8cm and MN is the middle line that divides AB and BC by two

thus, MB =BN= 4 cm. MN is the middle line thus will also be equal to the half of AC  meaning MN=AC/2= 4cm. and perimeter  is MBN = MN+MB+BN= 4cm+4cm+4cm =12cm

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