Angles in triangles

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

Angles in quadrilaterals

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

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

The internal angles in all triangles sum to ___.

Tick the expressions that could represent the angles in a triangle.

Finish the expression so that it could represent the angle sum of a triangle. 60°+ 75° + {{ }}°

The image is not to scale. Calculate missing angle a. A = {{ }}°

Look at the hands on this clock face and the arrow. The angle formed is __________.

This triangle has three equal sides and three equal vertices. Select the correct name for this triangle.

Match the angles to the correct description

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

Angles in triangles

Lesson outcome