Geometry questions This is a list of recently added questions about geometry. Play geometry quiz and see all the questions. The geometrical structure depicted in the picture is called;Spiral of Theodorus. In geometry, the spiral of Theodorus is a spiral composed of contiguous right triangles. It was first constructed by Theodorus of Cyrene.The principle of construction is based on the Pythagorean theorem.Created by: Tschuka hard 47% Hippocrates hairpinHippocrates hairpin29Spiral of ArchimedesSpiral of Archimedes103Euclid's crustEuclid's crust53Spiral of TheodorusSpiral of Theodorus167mathematics riddles » In which year did Leonhard Euler introduced the symbol "i" to represent the square root of -1 ?In 1777. The letter "i" as a designation of the element from -1 was proposed by Leonhard Euler in 1777. Later, from 1801, this designation was popularized by Carl Friedrich Gauss. Currently, it is the most commonly used symbol of the imaginary unit.Created by: Tschuka hard 40% in 1555in 1555152in 1666in 1666477in 1777in 1777760in 1888in 1888487numbers riddles » What is the shape do erythrocytes in human blood?Oval biconcave disks. In humans, mature red blood cells are flexible and oval biconcave discs. They lack a cell nucleus and most organelles, in order to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack. Approximately 2.4 million new erythrocytes are produced per second in human adults.Created by: Tschuka hard 58% Oval convex discsOval convex discs118One-sided convex discOne-sided convex disc125Oval biconcave disksOval biconcave disks425SphereSphere60body riddles » The illustration shows the figure known in mathematics as;Lune of Hippocrates,. In geometry, the lune of Hippocrates, named after Hippocrates of Chios, is a lune bounded by arcs of two circles, the smaller of which has as its diameter a chord spanning a right angle on the larger circle. Equivalently, it is a non-convex plane region bounded by one 180-degree circular arc and one 90-degree circular arc. It is the first curved figure to have its exact area calculated mathematically.Created by: Tschuka very hard 22% Tales' sailsTales' sails41Pythagorean sicklesPythagorean sickles42Archimedes' archesArchimedes' arches41lune of Hippocrates,lune of Hippocrates,37mathematics riddles » How is the infinity symbol called?Lemniscate refers not only to the infinity symbol but also to any geometric shape that is curved like a figure-eight.Created by: Ninjaivery hard 17% lemniscatelemniscate74omniscateomniscate262perniscateperniscate54ettoniscateettoniscate40names riddles » A triangle can NOT have sides of ...1cm, 2cm, 3cm. The triangle inequality states that the sum of the lengths of any two sides of a triangle must be greater than or equal to the length of the third sideCreated by: lukasz Polandhard 54% 1cm, 2cm, 3cm1cm, 2cm, 3cm10234cm, 5cm, 6cm4cm, 5cm, 6cm1287cm, 8cm, 9cm7cm, 8cm, 9cm135All of the answers are correctAll of the answers are correct600author: lukasz Poland riddles » How many degrees an obtuse angle can have ?90-180. The obtuse angle may measure from 90 to 180 degrees. Angles having a degree of 0 to 90 are acute angles, whereas those from 180 to 360 - concave angles.Created by: TotalBellendeasy 76% 0-3600-36037790-18090-18090230-900-90296180-360180-3602032mathematics riddles » What is the volume of a soap bubble with radius R=1 cm?4/3π cm3. Equation for the volume of a sphere: 4/3πR^3.Created by: Paweł Kołodziejczykhard 58% 3/4π cm33/4π cm328874/3π cm34/3π cm387784,3π cm34,3π cm31412It isn't possible to calculateIt isn't possible to calculate1853mathematics riddles » If Earth's radius was larger by 1 meter, how much longer would its equator be?By approx 6 meters. For each circle, the length of the circumference is c=2πr. Hence, if a radius grows by 1 meter, the circumference grows by 2 π meters - no matter what the initial value of radius was.Created by: SpikeMehard 45% by approx 6 metersby approx 6 meters13398by approx 6 kilometersby approx 6 kilometers5247by approx 60 kilometersby approx 60 kilometers6127by approx 6000 kilometersby approx 6000 kilometers4510math riddles » How many edges does a cube have?12. A cube has six square faces, each of which has four edges - but each edge is shared with another face.Created by: globalquiz.orgvery easy 80% 4431788256112122136016162340math riddles » Play geometry quiz and see all the questions.