Perimeter means finding the total area of the outside of the triange (so the sum of all sides).
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Answer:
a is 2.5
b is 1
gradient is rise over run
The fraction 8/21 cannot be simplified because the numerator and denominator don't have a common factor except 1.
To find the distance between 2 numbers you must take the absolute value of the difference
|90-(-20)|
|110|
110
110 degrees celsius
0.36.
tenth position is b in . 0.ab