Answer:
The value of a is 50°.
Step-by-step explanation:
In an isosceles triangle, 2 sides have the same lengths and same angles so we can assume that the other side of the triangle is 65°.
Given that the total angle of a triangle is 180°, so have to subtract it :
[tex]a = 180 - 65 - 65[/tex]
[tex]a = 180 - 130[/tex]
[tex]a = 50[/tex]
