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An angle of 90° at a given point on a line

An angle of 90° at a given point on a line. A. B. C. An angle of 90° at a given point on a line. Task: C is a point on line AB. Task: C is a point on line AB. Using ruler and compasses construct an angle of 90° at C. Construction:. Conclusion:. E. Join CE.

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An angle of 90° at a given point on a line

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  1. An angle of 90° at a given point on a line

  2. A B C An angle of 90° at a given point on a line Task: C is a point on line AB. Task: C is a point on line AB. Using ruler and compasses construct an angle of 90° at C. Construction: Conclusion: E • Join CE. • Mark any point O outside AB. • Join DO and produce it to meet the circle at E. • Centre O, radius OC, draw an arc to cut AB again at D. • EC is the perpendicular to AB. • ECB is 90°. O D

  3. A B C An angle of 90° at a given point on a line Task: C is a point on line AB. Using ruler and compasses construct an angle of 90° at C. Task: Task: C is a point on line AB. Conclusion: RESTART E • EC is the perpendicular to AB. END SHOW • ECB is 90°. O D

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