Which of the following statements are true for a trapezoid?
it is a quadrilateral
it has two right angles
it has only one pair of parallel sides
any sides can be the base
the end points of the altitude are on each base.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?