1. Title
Date
To assess my understanding of triangles and angle facts.
12/11/2018
Starter Activity
Complete the ‘Heard the Word Grid.’
Are there any key words that you have learnt or have a better understanding of now than you did at the start of this unit of work?

2. Degrees Interior Angles Exterior Angles Regular Polygon
Key Words / symbols
Never heard before?
Heard of but not sure what it means?
Know what it means and can explain it in context
Jot down your ideas here…
Degrees
Regular Polygon
Irregular Polygon
Parallel Lines
Interior Angles
Exterior Angles
Print slides 3-10 two slides to a page.

3. The shape below is made from a triangle and a rectangle. 1
Questions and Answers
Fluency
The shape below is made from a triangle and a rectangle.
Mark the right angles.
Problem Solving
True or False?
‘A square is the only polygon with 4 right angles.’
You must give a reason for your answer.
Reasoning
How would you describe a right angle to someone else?

4. Measure this angle and write down the size to the nearest degree. 2
Questions and Answers
Fluency
Measure this angle and write down the size to the nearest degree.
Is this an acute, obtuse, reflex or right angle?
How do you know?
Problem Solving
Jenny says that angle a is 92°.
Is jenny right?
You must give a reason for your answer.
Reasoning
What is the same and what is different about a scalene triangle and an isosceles triangle.

5. Problem Solving Fluency Reasoning3
Problem Solving
PQR is a triangle.
QRS is a straight line.
Find the size of the angle marked y.
y = °
Give a reason for your answer.
Fluency
Reasoning
Is it possible for a triangle to have angles of the sizes shown?
Explain your answer.
Calculate the size of angle x.
Show all your working out.
Diagram not drawn accurately. P
Diagram not drawn accurately. Q R S
Print slides 2-10 two slides to a page.
Diagram not drawn accurately.

6. Fluency 4 Questions and Answers
The diagram shows an irregular heptagon.
Work out the size of angle x
Give a reason for your answer.

7. A regular polygon has 21 sides. 4
Questions and Answers
Problem Solving
A regular polygon has 21 sides.
Explain how you would work out the size on one interior angle.

8. 4
Questions and Answers
Reasoning
If we know that a regular polygon has an exterior angle of 20o, what else do we know?

9. On the diagram below mark two alternate angles.5
Questions and Answers
Fluency
On the diagram below mark two alternate angles.
On the diagram below mark two corresponding angles.

10. Problem Solving 5 Questions and Answers Work out the size of angle x.
You must give a reason for your answer.

11. Is it possible to work out the size of angle x? 5
Questions and Answers
Reasoning
Is it possible to work out the size of angle x?
You must explain your answer.
Diagram not drawn accurately.

12. Use the space below to set yourself a question similar to the ones you were able to answer confidently.
Use the space below to answer the question that you have set yourself
My own question…
My answer…

13. Angles 5 4 3 2 1 I can identify right angles.
I can recognise, measure and draw acute, obtuse and reflex angles.
I know the sum of the angles on a line is and the sum of the angles at a point.
I can recognise right-angled, equilateral, isosceles and scalene triangles and know their properties.
I know the sum of the interior angles of a triangle and a quadrilateral.
I can calculate missing angles in triangles and quadrilaterals.
I can calculate the size of an interior and exterior angles in a regular and irregular polygons.
I can construct triangles to scale using ruler and protractor (SAS, ASA).
I can identify alternate and corresponding angles and calculate missing angles on parallel lines.
I can construct triangles using straight edge and compasses (SSS).
Dialogue marking sheet.

14. My teachers probing question My answer
What I will do to act upon my ‘Even Better If’’ comment
Strategy
Tick / Comments
Complete a mymaths lesson or booster pack
Use a revision guide or text book
Ask my teacher to explain during a lesson
Ask a peer to explain during a lesson
Ask someone at home to help
Attend a revision session at school
Attend homework club
Something else (describe your strategy here)
Dialogue marking sheet.