Angles in quadrilaterals

Maths

Review understanding and identification of right angles

Review understanding of angles as a measure of turn

Use the terms acute, obtuse and reflex when comparing angles to a right angle

Use the unit of degrees as a standard unit to measure angles

Describe static angles using the standard unit of degrees when compared to a right angle

Describe rotations using the standard unit of degrees when compared to a right angle

Estimate acute and obtuse angles using the standard unit of degrees

Know that the angles in a full turn sum to 360 degrees and use this to solve problems

Know that the angles at a point sum to 360 degrees and use this to solve problems

Know that the angles on a straight line sum to 180 degrees and use this to solve problems

Angles in triangles

Measure the size of angles accurately using a protractor

Draw angles accurately using a protractor

Reasoning about angles in polygons

In this unit pupils will compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees. In the future unit pupils will use knowledge of shape properties to draw, sketch and identify shapes.

In the prior unit pupils completed and composed symmetrical shapes from two congruent shapes and investigate lines of symmetry in 2D shapes. In this unit pupils will compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees.

In this unit pupils will compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees.

Angles: compare, name, estimate and measure angles

This is a quadrilateral. The angles of the vertices sum to {{ }}°

All rectangles have four vertices and each vertex is equal to {{ }}°

What is the missing value in this bar model? {{ }}°

The image is not to scale. What is the value of missing angle a? a = {{ }}°

Which of the angles shown is an obtuse angle?

Complete the sentence. {{ }}° is needed to complete the angles about a point.

The quadrilateral has four obtuse angles.

The quadrilateral has two acute angles and two obtuse angles.

The quadrilateral has two right angles and two acute angles.

This is a quadrilateral. Look carefully at the vertices and the angles inside the shape. Which statement is correct?

The quadrilateral has three acute angles and one reflex angle.

The quadrilateral has two acute angles, one obtuse angle and one reflex angle.

Angles in quadrilaterals

Lesson outcome