National 4; Trigonometric skills Calculating an angle in a right-angled triangle. Trigonometry helps solve problems involving right-angled triangles using the sine, cosine or tangent ratios. SOH ...

The Pythagorean Theorem, a cornerstone of geometry, empowers students to solve right triangle problems and unlock advanced ...

Given a triangle T, with vertices A, B, and C, t-one might indeed be described by ABC, with B being the central angle. I suggest that t-two, being described by BAC, is different. Similarly for BCA.

This triangle has a right angle. We call this a right-angled triangle. It cannot be an equilateral triangle because that would have 60º angles for all three angles, so none could be 90º.