A cloze-style sheet on angle rules in triangles and quadrilaterals for Year 6 maths. Pupils first complete a passage about interior angles, including isosceles triangles, then fill in structured workings such as x = 180° - 95° - 40° and y = 360° - 110° - 85° - 70°. Detailed solutions included. Supports the England National Curriculum objective on finding unknown angles.
Geometry — properties of shapes
“Find unknown angles in triangles, quadrilaterals and regular polygons”
The scaffolded workings model the subtraction method for each shape.
A fill-in-the-blank passage covering angle totals and isosceles triangles.
Diagram questions with scaffolded working, like z = (180° - 50°) ÷ 2 for an isosceles triangle.
Detailed solutions for all three practice problems.
Guided practice
The part-completed workings suit the first lesson on missing angles.
Intervention group
Scaffolding carries pupils who freeze at a blank diagram.
Pre-teach reading
The rules passage primes vocabulary before an angles investigation.
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