Describe static angles using the standard unit of degrees when compared to a right angle
Lesson details
Learning outcome
I can describe static angles using the standard unit of degrees when compared to a right angle.
Key learning points
- There are 90 degrees in a right angle
- Acute angles are between 0 and 90 degrees
- Obtuse angles are between 90 and 180 degrees
- Reflex angles are greater than 180 degrees
Keywords
Degrees - A degree is a unit of measure for angles.
Estimate - To estimate is to find a value that is close enough to the right answer, usually with some thought or calculation involved.
Common misconception
90 degrees is classified as an acute angle and 180 degrees is classified as an obtuse angle.
Provide opportunities for pupils to classify angle sizes and build towards understanding that acute angles are between 0-89 degrees and obtuse angles are between 91-179 degrees. Classifying multiples of right angles as a separate group may help.
Teacher tip
Take time in the lesson for children to work independently and in pairs to estimate the size of a range of angles. Encourage identification of angle type and reasoning around estimate choice.
Licence
Lesson video
Loading...
Prior knowledge starter quiz
6 Questions
Q1.Look at the hands on this clock face and the arrow. How does the angle created by the hands compare to a right angle?
Q2.Look at the hands on this clock face and the arrow. The angle formed is __________.
Q3.Which of the angles shown is an acute angle?
Q4.Look at the hands on this clock face and the arrow. The angle formed is __________.
Q5.This is a triangle. Look carefully at the vertices and the angles inside the shape. Which statement is correct?
Q6.Match the shape to its properties.
A quadrilateral with two pairs of parallel sides.
A quadrilateral with four equal sides and four right angles.
A quadrilateral with exactly one pair of parallel sides.
Assessment exit quiz
6 Questions
Q1.Which of the angles shown is a right angle?
Q2.Match the descriptions to the correct number of degrees of turn.
90°
180°
360°
Q3.Which of these is the best estimate for the angle shown?
Q4.Which of these is the best estimate for the angle shown?
Q5.Which of these is the best estimate for the angle shown?
Q6.Which of these is the best estimate for the angle shown?
To help you plan your 5 maths lesson on: Describe static angles using the standard unit of degrees when compared to a right angle, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Describe static angles using the standard unit of degrees when compared to a right angle, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Angles: compare, name, estimate and measure angles unit, dive into the full primary maths curriculum, or learn more about lesson planning.