Checking understanding of angles from KS2

Maths

Securing understanding of angles from KS2

Formalising understanding of triangles from KS2

Formal angle notation

Corresponding angles

Alternate angles

Co-interior angles

Angles on parallel lines traversed by a straight line

The sum of the interior angles of any triangle

Using the sum of the interior angles of a triangle

Interior angles of a polygon

Deriving the sum of interior angles in multiple ways

Exterior angles of polygons

Interior and exterior angles of regular polygons

Missing angles

Problem solving with polygons

This unit gives pupils the opportunity to explore polygons and begin to generalise their understanding of interior/exterior angles in regular polygons. In the future unit, pupils will use the geometrical properties of a rhombus to perform various constructions

In this unit, pupils learnt how to calculate with angles at a point and angles on a straight line. In this unit, pupils extend their knowledge about angles in lines

In this unit pupils will investigate internal and external angles of polygons and angles made with a transveral and parallel lines. Pupils will develop their ability to formally prove properties of polygons to generalise.

Geometrical properties: polygons

The angles 119° and $$x$$° are supplementary angles. Find the size of angle $$x$$°.

The size of angle $$d$$ is measured accurately. Which of these values shows the size of angle $$d$$, in degrees?

The angles 167° and $$y$$° are conjugate angles. Angle $$y$$° is {{ }}°.

Angles $$e$$° and 125° are supplementary angles.

Angles $$e$$° and 125° are conjugate angles.

Which of these statements about this diagram are accurate?

QR is a line segment. Find the value of $$f+g+h+j$$.

Complete the sentence: 77° is   ____________   angle.

Which of these calculations gives a different answer to the others?

A 2D shape with at least one straight side.

All 2D shapes that are not circles are polygons.

A 2D shape made up from only straight line segments. 

Triangles and squares are the only polygons.

Which of these is the most accurate description of a polygon?

Which of these properties of a polygon always remain invariant when the polygon is reflected? 

Which of these properties of a polygon always remain invariant when the polygon is positively enlarged? 

Checking understanding of angles from KS2

Lesson outcome