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?

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.

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?

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.

Problem Solving Fluency Reasoning 3 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.

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

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.

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

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.

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

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.

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…

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.

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.