Respuesta :

osikbro

Answer:

21 cm

Step-by-step explanation:

Since this is an isosceles triangle, the two sides with a line through them must have the same value of x. Therefore, you can set up the following equation:

2x+11=53

2x=42

x=21 cm

Hope this helps!

Answer:

21

Step-by-step explanation:

53 - 11 = 42

42/2 = 21

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