'Angled triangles' diaporamas de présentation

An isosceles triangle has one line of symmetry

An isosceles triangle has one line of symmetry. An isosceles triangle has no rotational symmetry. A triangle can have either one, two or three lines of symmetry. An triangle can have no lines of symmetry. An triangle can have rotational symmetry of order 2.

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A triangle has sides of length 23.8 cm, 31.2 cm and 39.6 cm. Is this a right-angled triangle?

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Dynamic applications of the parallelogram law

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TOA

The three trigonometric ratios for right angled triangles are considered here. Click on a box to select a ratio. SOH. CAH. TOA. 1. sin ?. ?. Back to menu. SOH. On the unit circle sin ? is observed. 1. sin ?. Now take a similar triangle. SOH. ?. Hyp. 1. Opp. sin ?. =.

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Right Angled Triangles

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Pencil Problem

Pencil Problem. An Investigation. The diagrams show a number of pencils of various sizes. A pupil picks up three pencils at random and forms a triangle. How many different triangles can he actually form? How many of these triangles will be right angled triangles?. Solution 23 possibilities

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GCSE Mathematics Problem Solving Shape and Measure Higher Tier

GCSE Mathematics Problem Solving Shape and Measure Higher Tier. Prove that these are similar triangles. 3cm. 6cm. 4cm. Helping Hand. 8cm. Consider what would make these triangles similar. Find the length of the missing sides, that is the longest side of both right angled triangles.

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