1. Trigonometry – Angles – Bingo Method
Students should choose nine answers from the grid and place them
randomly into a 3x3 square in their book.
You may want to pause your display and choose questions
according to difficulty during the game.
Depending on time, students could win with
a line, an X, or a ‘full house’ (all).

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3. BINGO! 45 54 23 82 37 12 76 25 91
Trigonometry:
Calculating Angles

4. Choose your numbers… 𝑥 = 31.0 𝑥 = 53.1 𝑥 = 27.8 𝑥 = 68.2 𝑥 = 35.7
𝑥 = 26.4
𝑥 = 39.7
𝑥 = 32.2
𝑥 = 50.3
𝑥 = 23.2
𝑥 = 64.6
𝑥 = 25.8
𝑥 = 51.1
𝑥 = 18.4
𝑥 = 35.0
𝑥 = 41.6
Draw a 3x3 grid in your book.

5. Choose your numbers…
31.0
53.1
27.8
68.2
35.7
26.4
39.7
32.2
50.3
23.2
64.6
25.8
51.1
18.4
35.0
41.6
Draw a 3x3 grid in your book.

6. SOH CAH TOA A H O Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 7 15 𝑆𝑖𝑛 −1 7 15 =
15 cm
7 cm
Sin 𝑥= 7 15
𝑆𝑖𝑛 − =
27.8°
(1 dp)

7. SOH CAH TOA H O A Find 𝑥. 𝑥° Cos 𝑥= 𝐴 𝐻 Cos 𝑥= 10 13 𝐶𝑜𝑠 −1 10 13 =
13 cm O 𝑥° A
10 cm
Cos 𝑥= 10 13
𝐶𝑜𝑠 − =
39.7°
(1 dp)

8. SOH CAH TOA O H A Find 𝑥. 𝑥° Tan 𝑥= 𝑂 𝐴 Tan 𝑥= 7 10 𝑇𝑎𝑛 −1 7 10 =
7 cm O H
Tan 𝑥= 𝑂 𝐴 𝑥°
10 cm A
Tan 𝑥= 7 10
𝑇𝑎𝑛 − =
35.0°
(1 dp)

9. SOH CAH TOA H O A Find 𝑥. 𝑥° Cos 𝑥= 𝐴 𝐻 Cos 𝑥= 6 14 𝐶𝑜𝑠 −1 6 14 =
14 cm 𝑥° A
6 cm
Cos 𝑥= 6 14
𝐶𝑜𝑠 − =
64.6°
(1 dp)

10. SOH CAH TOA H O A Find 𝑥. 𝑥° Cos 𝑥= 𝐴 𝐻 Cos 𝑥= 9 10 𝐶𝑜𝑠 −1 9 10 =
10 cm O 𝑥° A
9 cm
Cos 𝑥= 9 10
𝐶𝑜𝑠 − =
25.8°
(1 dp)

11. O SOH CAH TOA H A Find 𝑥. 𝑥° Tan 𝑥= 𝑂 𝐴 Tan 𝑥= 5 15 𝑇𝑎𝑛 −1 5 15 =
5 cm H
Tan 𝑥= 𝑂 𝐴
15 cm A 𝑥°
Tan 𝑥= 5 15
𝑇𝑎𝑛 − =
18.4°
(1 dp)

12. SOH CAH TOA H O A Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 7 9 𝑆𝑖𝑛 −1 7 9 = 51.1°
9 cm
7 cm O 𝑥° A
Sin 𝑥= 7 9
𝑆𝑖𝑛 − =
51.1°
(1 dp)

13. SOH CAH TOA O H A Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 10 13 𝑆𝑖𝑛 −1 10 13 =
10 cm
13 cm H 𝑥° A
Sin 𝑥= 10 13
𝑆𝑖𝑛 − =
50.3°
(1 dp)

14. SOH CAH TOA H O A Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 7 12 𝑆𝑖𝑛 −1 7 12 =
12 cm
7 cm 𝑥° A
Sin 𝑥= 7 12
𝑆𝑖𝑛 − =
35.7°
(1 dp)

15. SOH CAH TOA O H A Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 8 15 𝑆𝑖𝑛 −1 8 15 =
8 cm
15 cm 𝑥° A
Sin 𝑥= 8 15
𝑆𝑖𝑛 − =
32.2°
(1 dp)

16. SOH CAH TOA O H A Find 𝑥. 𝑥° Tan 𝑥= 𝑂 𝐴 Tan 𝑥= 20 8 𝑇𝑎𝑛 −1 20 8 =
20 cm
Tan 𝑥= 𝑂 𝐴 𝑥° A
8 cm
Tan 𝑥= 20 8
𝑇𝑎𝑛 − =
68.2°
(1 dp)

17. SOH CAH TOA O H A Find 𝑥. 𝑥° Cos 𝑥= 𝐴 𝐻 Cos 𝑥= 6 7 𝐶𝑜𝑠 −1 6 7 = 31.0°
7 cm
6 cm A 𝑥°
Cos 𝑥= 6 7
𝐶𝑜𝑠 − =
31.0°
(1 dp)

18. SOH CAH TOA H O A Find 𝑥. 𝑥° Tan 𝑥= 𝑂 𝐴 Tan 𝑥= 8 9 𝑇𝑎𝑛 −1 8 9 = 41.6°
8 cm 𝑥° A
9 cm
Tan 𝑥= 8 9
𝑇𝑎𝑛 − =
41.6°
(1 dp)

19. SOH CAH TOA O H A Find 𝑥. 𝑥° Sin 𝑥= 𝑂 𝐻 Sin 𝑥= 4 9 𝑆𝑖𝑛 −1 4 9 = 26.4°
4 cm O
Sin 𝑥= 𝑂 𝐻 H
9 cm A 𝑥°
Sin 𝑥= 4 9
𝑆𝑖𝑛 − =
26.4°
(1 dp)

20. SOH CAH TOA H O A Find 𝑥. 𝑥° Cos 𝑥= 𝐴 𝐻 Cos 𝑥= 9 15 𝐶𝑜𝑠 −1 9 15 =
15 cm 𝑥°
9 cm A
Cos 𝑥= 9 15
𝐶𝑜𝑠 − =
53.1°
(1 dp)

21. SOH CAH TOA H O A Find 𝑥. 𝑥° Tan 𝑥= 𝑂 𝐴 Tan 𝑥= 3 7 𝑇𝑎𝑛 −1 3 7 = 23.2°
3 cm 𝑥° A
7 cm
Tan 𝑥= 3 7
𝑇𝑎𝑛 − =
23.2°
(1 dp)

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