I need help with classify the triangle below by side and by measure

To prove "p is equal to q" using an indirect proof, what would your starting assumption be?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f

Math i have no idea how to do a and b