query: Length of a focal chord
positive_passages.docid: 21744
positive_passages.text: Focal length of an ellipse and related results
negative_passages.docid: 56281
negative_passages.text: Is there a \show for lengths?
negative_passages.docid: 94271
negative_passages.text: What is the reference plane used when the minimum focus distance is measured?
negative_passages.docid: 118501
negative_passages.text: Proving the length of a circle's arc is proportional to the size of the angle
negative_passages.docid: 11338
negative_passages.text: How to find the circumcenter of a triangle and the length of the corresponding radius of the circle in $\mathbb{R}^3$
negative_passages.docid: 55259
negative_passages.text: ArcTan[z] and ArcTan[x,y], Restriction and Conversion
negative_passages.docid: 91709
negative_passages.text: Examples in which the light maximizes the optical path length
negative_passages.docid: 75694
negative_passages.text: The Schwarz Reflection Principle for a circle
negative_passages.docid: 3016
negative_passages.text: How to determine the arc length of ellipse?
negative_passages.docid: 134290
negative_passages.text: Connecting line features and determining the length of the longest line
negative_passages.docid: 83556
negative_passages.text: What are the theoretical minimum and maximum apertures?
negative_passages.docid: 134974
negative_passages.text: What is the focal length on your typical cell phone camera?
negative_passages.docid: 117618
negative_passages.text: How to geometrically prove the focal property of ellipse?
negative_passages.docid: 49187
negative_passages.text: What is focal length and how does it affect my photos?
negative_passages.docid: 59156
negative_passages.text: What lens is needed to change the minimal focus distance length of my camera?
negative_passages.docid: 111044
negative_passages.text: Vector path length of a hypotenuse
negative_passages.docid: 122835
negative_passages.text: Lengths and when to use them