Types of Triangles: Sides and Angles (detailed) — free printable diagram

About this illustration

A detailed, fully-labelled reference chart titled 'Types of Triangles: Sides and Angles'. The top row contains four key-facts boxes (properties of triangles, angle sum, tick-mark legend, vertex definition). Below are six triangle panels arranged in a 3×2 grid: 1. Equilateral (three 60° angles, tick marks on all sides), 2. Isosceles (base angles labelled α, apex labelled β, tick marks on two equal sides), 3. Scalene (angles α, β, γ, no equal sides), 4. Right-angled (90° angle with square symbol, hypotenuse labelled, angles α and β), 5. Acute (angles α, β, γ, all less than 90°), 6. Obtuse (one angle labelled α >90°, others β and γ). A Properties Summary table at the bottom covers Equal Sides, Equal Angles, Angle Properties, and Key Feature for each type. A legend at the very bottom explains tick marks, square symbol, angle arc, and vertex dot.

How to use

1. 1Right-click the image and choose “Save image as”, or use the download button.
2. 2Use it in your classroom worksheets, slides or printables — free under CC BY-NC 4.0.
3. 3Attribute as “Image by Kuraplan” or link back to kuraplan.com. Not for commercial resale.