This is an updated version of a story first published on May 5, 2024. For many high school students returning to class, it ...

This is an updated version of a story first published on May 5, 2024. For many high school students returning to class, it may seem like geometry and trigonometry were created by the Greeks as a form ...

Calculate the missing angles \(x\), \(y\) and \(z\). The angle in a semicircle is 90°.

Our physical world is embedded in a geometric environment. Plane geometry has many amazing wonders beyond those that are briefly touched on in school curriculums. The triangle, one of the basic ...

The reflexive property ; Vertical angles are congruent ; The parallel-line theorems ; Two points determine a line ; All radii are congruent ; If sides, then angles ; If angles, then sides ; Triangle ...

Many objects such as packing containers, buildings and components of machines have geometric representations that use two- and three-dimensional shapes. This leads to many practical scenarios that ...