What is Rotoinversion?
Space and AstronomyIn geometry, an improper rotation, also called rotation-reflection, rotoreflection, rotary reflection, or rotoinversion is an isometry in Euclidean space that is a combination of a rotation about an axis and a reflection in a plane perpendicular to that axis. What is Rotoinversion symmetry? The rotoinversion is the symmetry operation required to transpose one object onto
What is a reflection in geometry?
Space and AstronomyA reflection is an isometry, which means the original and image are congruent, that can be described as a “flip”. To perform a geometry reflection, a line of reflection is needed; the resulting orientation of the two figures are opposite. How do you describe a reflection in geometry? A reflection is a transformation that acts
What does center center mean?
Space and AstronomyCenter and centre have the same meaning. Center is the correct spelling in American English, while in British English centre is correct. Notice that center (and centre) can be a noun, adjective, or a verb. Seeing the two words in real-life examples may help you to visualize how to use them. What does in the
How do you resolve vectors to horizontal and vertical components?
Space and AstronomyHow do you resolve vectors into vertical and horizontal components? Video quote: The angle between the slope and the direction of this vector is 55°. We could resolve this vector into two components. One component that is acting perpendicular to the slope or into the slope. How do you find the vertical and horizontal components?
What is the difference between an expression and a function?
Space and AstronomyExpressions are “syntactical” objects, i.e. pieces of language. Functions are (mathematical) objects, i.e. pieces of the world. A function is described/specified by an expression; the same function can be described by more than one expression. Is an expression a function? Thus an expression represents a function whose inputs are the values assigned to the free
What two transformations make up a glide reflection?
Space and AstronomyTo do a glide reflection, perform the two transformations, which are 1) reflection over the given line of reflection and 2) translation with respect to the given directions. What is the composition of two glide reflections? The composition of two (or more) isometries is an isometry. Note : Because a glide reflection is a composition
How do you prove a quadrilateral is a kite?
Space and AstronomyIf two disjoint pairs of consecutive sides of a quadrilateral are congruent, then it’s a kite (reverse of the kite definition). If one of the diagonals of a quadrilateral is the perpendicular bisector of the other, then it’s a kite (converse of a property). How do you show ABCD is a kite? Video quote: So
Does the Moon’s gravity affect humans?
Space and AstronomyThere is no absolute proof that the Moon affects human mental and physical health, though its effect has been observed in other organisms: corals for instance appear to time their spawning based on the lunar cycle. How does the moon’s gravity affect us? The moon’s gravitational pull on the Earth is the main cause of
What does a total eclipse look like from Earth?
Space and AstronomySome parts of Earth fall inside a region that experiences complete darkness, known as the path of totality. Inside this path, a total solar eclipse looks like a black ball in the sky with wisps of light streaming out around it. On the moon, a solar eclipse makes Earth look like a giant eyeball staring
Is rhumb line a great circle?
Space and AstronomyAdditionally, all meridians are rhumb lines, in addition to being great circles. A rhumb line always spirals toward one of the poles, unless its azimuth is true east, west, north, or south, in which case the rhumb line closes on itself to form a parallel of latitude (small circle) or a pair of antipodal meridians.