WEBVTT
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Here are five triangles on a square grid.
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Four of the triangles have the same area.
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Which triangle has a different area?
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The area of a triangle is half base times height or the base times the height divided by two.
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Triangle π΄ has a base measuring one square and its height is five squares.
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Five times one is five, divided by two or five halved is 2.5.
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The base of triangle π΅ is one and its height is six.
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One times six is six and half of that is three.
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Triangle πΆβs base is two and its height is three.
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Three times two is six.
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Half of that is three.
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The base of triangle π· is three; its height is two.
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Three times two is six and half of six is three.
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And triangle πΈ also has an area of three.
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Its base is two; its height is three.
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Two times three is six and a half of six is three.
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So the triangle which has a different area is triangle π΄.
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It has an area of 2.5 squares.
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And all the other triangles have an area of three.