Atoy train car is 6 in. long. if a real train car is 75 ft long, which of the following have the same constant of proportionality as the toy train car to the real train car?

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°

Is a square always, sometimes, or never a parallelogram

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?