Year 8 · Maths

Derive Use The Sum Of Angles For Deduction

Year 8 learners practise sum of interior and exterior angles of polygons.

The activities include Calculate Missing Angles in Quadrilaterals, Calculate the Exterior Angles of Regular Polygons, Find Angles in Quadrilaterals, and related practice. The checked support below includes video, teaching, lesson, practice. Open a resource in its provider's website and choose the format that best helps the learner explain the idea independently.

Activities covered

Calculate Missing Angles in Quadrilaterals
Calculate the Exterior Angles of Regular Polygons
Find Angles in Quadrilaterals
Find the Size of an Interior Angle in Regular Polygons
Find the Sum of Interior Angles

Checked learning resources

Oak video: Interior And Exterior Angles Of Regular Polygons

Oak National Academy · Video · Opens on the provider website

I can find the interior and exterior angles of regular polygons. Exterior angles of a regular polygon are equal. The size of the exterior angle of a regular polygon can be determined. Interior angles of regular polygons
Oak video: Deriving The Sum Of Interior Angles In Multiple Ways

Oak National Academy · Video · Opens on the provider website

I can use reasoning to derive the sum of interior angles in multiple ways. Not all vertices of component shapes contribute to the sum of the interior angles of a composite shape. A numerical sequence can be used to deriv
Oak lesson slides: Interior And Exterior Angles Of Regular Polygons

Oak National Academy · Teaching · Opens on the provider website

I can find the interior and exterior angles of regular polygons. Exterior angles of a regular polygon are equal. The size of the exterior angle of a regular polygon can be determined. Interior angles of regular polygons
Oak lesson slides: Deriving The Sum Of Interior Angles In Multiple Ways

Oak National Academy · Teaching · Opens on the provider website

I can use reasoning to derive the sum of interior angles in multiple ways. Not all vertices of component shapes contribute to the sum of the interior angles of a composite shape. A numerical sequence can be used to deriv
Geometrical properties: polygons

Oak National Academy · Teaching · Opens on the provider website

Current Oak teacher unit support for Derive Use The Sum Of Angles For Deduction; selected after reading the full activity context: In this worksheet, students will calculate angles in quadrilaterals.
Find Angles in Quadrilaterals video

Corbettmaths Primary · Video · Opens on the provider website

Year 8 Maths video matched to find angles in quadrilaterals.
Geometrical properties: polygons

Oak National Academy · Lesson · Opens on the provider website

Year 8 Maths resource matched to sum of interior and exterior angles of polygons.
Angles

BBC Bitesize · Lesson · Opens on the provider website

Year 8 Maths resource matched to sum of interior and exterior angles of polygons.