Please answer :) I will be so happy

Giving ad is congruent to bc and angle bcd is congruent to angle adc prove d e is going to ce

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

X+y=-4 x-y=2 use elimination with adding and subtraction