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Calculating missing angles in triangles and quadrilaterals

Calculating missing angles in triangles and quadrilaterals

Subject: Mathematics

Age range: 11-14

Resource type: Lesson (complete)

Last updated

2 December 2025

pptx, 1.11 MB
pptx, 1.11 MB

Examples on calculating missing angles in triangles and quadrilaterals, including isosceles triangle and angles outside a triangle (using the angle fact that angles on a straight line add up to 180). Lots of questions with answers provided.

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