2n+2 cm
9 The diagram shows four angles round a point.
a Write an inequality for...
b Solve the inequality,
c Explain why the angle labelled x cannot be a right angle.
x + 30
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geometry, an equilateral triangle is atriangle in which all three sides are equal. In the familiar Euclidean geometry, anequilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.
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