Answer:
AB = 78
Step-by-step explanation:
Using Pythagoras' identity in the righr triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
AB² = 72² + 30² = 5184 + 900 = 6084 ( take the square root of both sides )
AB = = 78
Negative slope
It is negative.
A=½b×h
½×6×p=9
3p=9
p=3mm
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