How should a manned-aircraft pilot typically enter the traffic pattern at a non-towered airport from the downwind side?

Why: The FAA study guide states: "Non-towered airport traffic patterns are always entered at pattern altitude... The preferred method for entering from the downwind side of the pattern is to approach the pattern on a course 45 degrees to the downwind leg and join the pattern at midfield."

• Describes a straight-in approach, which the source separately notes is usually reserved for aircraft executing an instrument approach, not the standard downwind-side entry.
• Invents an upwind-leg entry; the described standard entry from the downwind side is the 45-degree-to-downwind, midfield method.