PLS HELP ME RIGHT AWAY

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Can someone me and plz do the problem