Module 5 Higher Similarity and Congruence Set 4

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1
Starter: Congruent shapes
Pupils will just need to know that Congruent Shapes means they are the same and not be expected to know the conditions for congruent triangles
Starter: use Easiteach lesson to match congruent shapes.
Main: Similar figures:  Use Easiteach lesson to introduce similar shapes and use the scale factor to find missing lengths.
Complete ex 37.1 page 428 of Brown text book

           
 2 Finding lengths in similar triangles

Starter - finding lengths in similar triangles using Easiteach lesson ck
Main: similar triangles matching cards - find which triangles are similar by matching the angles and then find the missing sides - multiplying by scale factor to find the larger side and dividing by scale factor to find the side from smaller shape.  See ck for cards at least one day prior to lesson.

Or - main: complete ex 37.2, Brown text book
Plenary - slides 7 and 8 - mymaths link - identifying which triangles are similar and finding missing lengths
           
3
Find lengths in similar triangles (harder)

Powerpoint - shape - similar triangles
Main: Identifying which triangles are similar and finding missing sides - use Powerpoint slides 6 to 12. 

Exercise: Collins ex 12A page 294, ex 12B page 297 and ex 12C page 297 - select as appropriate.
Brown ex 37.2 page 430 and ex 37.3 page 432

Plenary: More difficult questions - Powerpoint slide 14.
Homework: Elmwood revision sheet 49H