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Rule for a Missing Angle on the Triangle (Level 1)

This math topic focuses on determining the relationships between angles in triangles, specifically within the context of geometry involving isosceles and equilateral triangles. It challenges students to use the triangle angle sum rule, where the total degrees in a triangle sum up to 180 degrees, to identify correct angle relationships and solve for missing angles, denoted by variables like x, y, z, b, d, n, and m. Each question presents a triangle with some angle values given and asks the student to identify the correct statement about the sum of the angles or the relationship between them.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

Rule for a Missing Angle on the Triangle

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


What is known about the angles labelled 40, 70, b

4070b