Pythagoras – Isosceles Triangles – Bingo Method

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Presentation transcript:

Pythagoras – Isosceles Triangles – 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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Pythagoras with Isosceles Triangles BINGO! 45 54 23 82 37 12 76 25 91 Pythagoras with Isosceles Triangles

Choose your numbers… 7.2 8.5 15 4.5 20.5 12.5 7.8 48 11.9 5.4 79.6 18.7 15.9 9.6 31.7 7.5 Draw a 3x3 grid in your book.

Find 𝑥 (1 dp) 𝑥 10 cm 13 cm 𝑥= 102+6.52 = 11.9 cm

Find 𝑥 (1 dp) 9 m 𝑥 10 m 𝑥= 92−52 = 7.5 m

Find 𝑥 (1 dp) 12 m 11 m 𝑥 𝑥= 122−112 × 2 = 9.6 m

Find 𝑥 (1 dp) 𝑥 16 cm 22 cm 𝑥= 222−82 = 20.5 cm

What is the area of this triangle? (1 dp) 10 mm ℎ 16 mm ℎ𝑒𝑖𝑔ℎ𝑡= 102−82 𝑎𝑟𝑒𝑎= 1 2 𝑏ℎ = 48 mm2

Find 𝑥 (1 dp) 8 cm 𝑥 6 cm 𝑥= 82+32 = 8.5 cm

The area of this triangle is 30 cm2. Find 𝑥 (1 dp) 𝑥 6 cm 10 cm 𝑏𝑎𝑠𝑒= 30×2 6 𝑥= 52+62 = 7.8 cm

Find 𝑥 (1 dp) 25 m 20 m 𝑥 𝑥= 252−202 = 15 m

Find 𝑥 (1 dp) 𝑥 3 cm 9 cm 𝑥= 4.52+32 = 5.4 cm

What is the area of this triangle? (1 dp) 8 cm ℎ 12 cm ℎ𝑒𝑖𝑔ℎ𝑡= 82−62 𝑎𝑟𝑒𝑎= 1 2 𝑏ℎ = 31.7 cm2

Find 𝑥 (1 dp) 𝑥 14 mm 20 mm 𝑥= 202−72 = 18.7 mm

What is the area of this triangle? (1 dp) ℎ 5 m 7 m ℎ𝑒𝑖𝑔ℎ𝑡= 52−3.52 𝑎𝑟𝑒𝑎= 1 2 𝑏ℎ = 12.5 m2

The area of this triangle is 24 cm2. Find 𝑥 (1 dp) 𝑥 6 cm 8 cm ℎ𝑒𝑖𝑔ℎ𝑡= 24×2 8 𝑥= 62+42 = 7.2 cm2

What is the area of this triangle? (1 dp) 4 km ℎ 3 km ℎ𝑒𝑖𝑔ℎ𝑡= 32−22 𝑎𝑟𝑒𝑎= 1 2 𝑏ℎ = 4.5 km2

Find 𝑥 (1 dp) 15 cm 14 cm 𝑥 𝑥= 7.52+142 = 15.9 cm

What is the area of this triangle? (1 dp) 23 cm 7 cm ℎ ℎ𝑒𝑖𝑔ℎ𝑡= 232−3.52 𝑎𝑟𝑒𝑎= 1 2 𝑏ℎ = 79.6 cm2

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