Class 7 NCERT • Ganita Prakash Maths Portal
Ch 07: A Tale of Three Intersecting Lines
Select a topic or study module below to explore triangle angle sums, equilateral constructions, the triangle inequality theorem, SSS, SAS, and ASA triangle constructions, and Figure It Out solutions.
Topic 01 • Triangle Angle Sums
Interior Angles (∠A, ∠B, ∠C), Angle Sum Property (180°) & Exterior Angle Rules
Topic 02 • Equilateral Triangles
Symmetric Properties of Equilateral Triangles, Compass Constructions & Equal Sides
Topic 03 • Triangle Inequality
Intersecting Circles, Sum of Two Sides > Third Side & Impossible Triangles
Topic 04 • SSS & SAS Constructions
Side-Side-Side (SSS) Arcs & Side-Angle-Side (SAS) Constructions with Protractors
Topic 05 • ASA & RHS Constructions
Angle-Side-Angle (ASA) & Right-Hypotenuse-Side (RHS) Triangle Constructions
Module 06 • Figure It Out & HOTS