2/9 divided by 1/2. invert the second fraction and multiply
2/9 * 2/1 = 4/9
She is incorrect. It doesn’t matter what sides you label a or b but c matters. The longest side (the hypotenuse) is always c.
Top right, it’s really easy just. Count the numbers
Area = (side length)^2
Here,
64n^36 = s^2. Take the sqrt of both sides, obtaining 8n^18 = s. This is the principal square root. We use this positive quantity because the measure of side length must be positive.
