Trigonometry Introduction Card Match A In this activity

Trigonometry – Introduction – Card Match A In this activity students work individually or in groups to match similar triangles. Students may or may not find the angles for each pair of triangles. ‘Quick Cut’ – Choose the questions/slides you wish to use and delete others. Sets of questions can then be easily guillotined to save time. One-sheet sets of cards are also included for students to cut out themselves.

Printing To print handouts from slides Select the slide from the left. Then click: File > Print > ‘Print Current Slide’ To print multiple slides Click on a section title to highlight all those slides, or press ‘Ctrl’ at the same time as selecting slides to highlight more than one. Then click: File > Print > ‘Print Selection’ To print double-sided handouts Highlight both slides before using ‘Print Selection’. Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

Which triangles have matching angles? Check the ratios for the opposite and adjacent sides. 4 of the cards have no match!

Which triangles have matching angles? Check the ratios for the opposite and adjacent sides. What is the shared angle?

Ratio 1 : 4 Ratio 1 : 3 Ratio 3 : 5 Ratio 4 : 5 Half Answers

Ratio 1 : 4 Ratio 1 : 3 Ratio 3 : 5 Ratio 4 : 5 Ratio 3 : 8 Ratio 2 : 5 Ratio 9 : 10 Ratio 1 : 2 Ratio 2 : 3 Ratio 3 : 4

Half Answers

E 6 cm 10 cm H 20 cm 12 cm

L 5 cm 10 cm P 4 cm 8 cm

N 3 cm 9 cm B 12 cm 4 cm

I 4 cm 6 cm K 8 cm 12 cm

C 16 cm 4 cm A 12 cm 3 cm

O 8 cm 10 cm F 15 cm 12 cm

G 16 cm M 12 cm 16 cm

D 4 cm 10 cm J 10 cm 9 cm

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk