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2 answers:
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Answer:
a
Step-by-step explanation:
if the top angle is 90° then the traingle is an isosceles triangle.
meaning that a=b.
this specific traingle is a silver traingle meaning that the ratio of the sides is 1:1:the root of 2.
so if
is 'a' multiplied by the root of two we need to divise it by the root of two to get 'a' and a=b.
