Respuesta :

ugochiallwell

Answer:

7

Step-by-step explanation:

the shape is an isosceles triangle and it has 2 equal sides

One side of the bigger triangle =17 so the other side will be 17

17=10+a

a=17-10

a=7

ZMaths

Answer:

C

Step-by-step explanation:

As you can see this question is very simple all sides match with each other so we know a is 7

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