Consecuative whole numbers lie n the square root of 59

Given that abcd is a parallelogram solve for m

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?