Draw a triangle. Easy ... Popularly used on guitar picks and trail route signs, this curvaceous triangle-like shape is named after German engineer Franz Reuleaux. For more details, skip to ...

Draw the square 4 cm by 4 cm base and attach the four congruent isosceles triangles with base 4 cm and height 6 cm on each side of the square. The net is complete. For a solid 3D shape ...

Now draw another dot on the extended part of ... and cannot be achieved with any other shape. As triangles are crucial to the design and construction of real world structures, such as buildings ...