G23a – Area of a triangle using sine

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Area of a triangle using sine

Teacher resources

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  • Slides in PPTX (with click-to-reveal answers)
  • Slides in PDF (one slide per page, suitable for importing into IWB software)
Links to past exam questions

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Unlimited practice questions

Activity: areas of regular polygons and limits

This applet shows you a regular polygon. Drag the slider to change its number of sides. No matter how many sides it has, the distance from its centre to each vertex is fixed at 1 cm. What do you notice about the area of the polygon as you increase the number of sides it has?