Work out the size of angle A

Use the diagonals to determine whether a parallelogram with vertices u(2,−2), v(9,−2), w(9,−6), and x(2,−6) is a rectangle, rhombus, or square. give all the names that apply.

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth