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# Q7

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### Transcript

• 1. <ul><li>Find ∠ x </li></ul>© mathsheuristics 
• 2. <ul><li>Find ∠ x </li></ul>© mathsheuristics  60° <ul><li>AC = BD </li></ul><ul><li>BCD is equilateral  </li></ul><ul><li> DCB = 60° </li></ul>1
• 3. <ul><li>Find ∠ x </li></ul>© mathsheuristics  <ul><li>AC = BD </li></ul><ul><li>BCD is equilateral  </li></ul><ul><li> DCB = 60° </li></ul>60°  DCA  60°÷ 2 = 30° 30° 1 2
• 4. <ul><li>Find ∠ x </li></ul>© mathsheuristics  <ul><li>AC = BD </li></ul><ul><li>BCD is equilateral  </li></ul><ul><li> DCB = 60° </li></ul>60°  DCA  60°÷ 2 = 30° 30° <ul><li>ACD is issoc  </li></ul><ul><li> CDA  (180° – 30°)÷ 2 = 75° </li></ul>75° 1 2 3
• 5. <ul><li>Find ∠ x </li></ul>© mathsheuristics  <ul><li>AC = BD </li></ul><ul><li>BCD is equilateral  </li></ul><ul><li> DCB = 60° </li></ul>60°  DCA  60°÷ 2 = 30° 30° <ul><li>ACD is issoc  </li></ul><ul><li> CDA  (180° – 30°)÷ 2 = 75° </li></ul>75°  ADB  180°– 75° – 30° = 75° 1 2 3 4
• 6. <ul><li>Find ∠ x </li></ul>© mathsheuristics  <ul><li>AC = BD </li></ul><ul><li>BCD is equilateral  </li></ul><ul><li> DCB = 60° </li></ul>60°  DCA  60°÷ 2 = 30° 30° <ul><li>ACD is issoc  </li></ul><ul><li> CDA  (180° – 30°)÷ 2 = 75° </li></ul>75°  ADB  180°– 75° – 30° = 75°  x  75° x 2 = 150° Ans 150° 1 2 3 4 5