See attachment. can right angles c and e be congruent? i'm confused because right angle e is on the outside while right angle c is on the inside but they are both right angles and equal the same degrees.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.