Question

(I am asking this question one more time) Please tell me the steps and use fractions.

A shape is randomly selected from the following quadrilaterals: parallelogram,
rhombus, rectangle, square, and trapezoid. What is the probability that it has four right angles, given that it has four congruent sides?

Answer 1

So, it's hard to know if the sides on the parallelogram are equal or not, but both a rhombus and square have four congruent sides, but only a square has four right angles.

So 1/2 shapes fit both parameters. Therefore there is a 50% probability it has four right angles, given that it has four congruent sides.