Answer:
7/3 in decimal form it's 2.3 repeated
Step-by-step explanation:
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Add sides 9


Subtract sides 6z


Divide sides by 2


Thus ;






Done...
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Hey I’m sorry but I do not know the answer.
If vertex angle is 42, and the base angles are congruent, this is an isosceles triangle, they each measure: 180-42/2. They each measure 69 degrees. The length of sides don't matter.