Our knowledge of a lot of things is most likely to change...because if there is new discoveries and better technology ..then scientist will most likely find out things that they didn't know before....hope this helps!
Answer:
8 cm and 9 cm
Explanation:
To estimate the sides of triangle we must understand that any side of a triangle is greater than the differences between any two sides and also less than the sum of the two sides.
In this problem;
One of the sides is 13cm;
According to our theorem, this sides is less than the sum of the other two sides and greater than difference between the two sides.
8 cm and 9 cm is the correct choice;
if the other two sides are 8cm and 9cm;
9cm - 8cm = 1cm
9cm + 8cm = 17cm
13cm is in between them.
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hope this helps
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