Geometry Problem 1397: Circle, Diameter, Tangent, Secant, 90 Degrees Angle, Perpendicular, Collinear Points
Proposition
The figure below shows a circle with diameter AB. Line CD is a tangent at D (C on AB extended). Line EA is perpendicular to AB (E on BD extended) and BF is perpendicular to AB (F on AD extended). Prove that the points E, F, and C are collinear.
Sketch of Problem 1397 using iPad Apps
Circular Patterns of Problem 1397 using iPad Apps
Geometric Art using Mobile Apps
Geometric art is a form of art based on the use and application of geometric figures. A geometric figure is any set or combination of points, lines, surfaces and solids. A mobile app or mobile application software is a computer program designed to run on smartphones and tablet computers.
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Circle
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Perpendicular lines
90 Degrees Angle
Tangent Line
Collinear Points
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