You arrive at an intersection with traffic lights that are not working because of a power outage. what do you do?

Treat the intersection like it has an 4-way stop sign.

When traffic signals are not working because of a power outage or other problem and not displaying any lights, you are required to stop, proceeding through the intersection as though it were an all-way stop. This does not apply if a law enforcement officer or other authorized person is directing traffic at the intersection, or if portable stop signs are in use

One of the angles would be 70 degrees and the other one would be 90 degrees

Each eukaryotic cell has a plasma membrane, cytoplasm, a nucleus, ribosomes, mitochondria, peroxisomes, and in some, vacuoles; however, there are some striking differences between animal and plant cells.