Respuesta :

∆=180°

one corner is a right angle which is 90°

assuming both other corners are identical they will each be 45°

(45°-3°)÷6=X

42°÷6=X

7=X
rachelpinto17
Since sides AB and AC are equal
Therefore,angleB=angleC (angles opposite to equal sides are equal)
Now,angleB=angleC=6x+3
So,angle sum property of a triangle =180 degrees.
=>90+6x+3+6x+3=180
=>96+12x=180
=>12x=84
=>x=7
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