3 Getting to know Triangles

Which triangle has a 90 degree angle?

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Which triangle has an angle over 90 degrees?

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Which triangle has three 60 degree angles?

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Which triangle perpendicular lines?

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Which triangle has parallel lines?

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• None. It's impossible for a single triangle to have parallel lines.

Which triangle has 3 lines of symmetry?

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Which triangles have only 1 line of symmetry?

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Which triangle has no lines of symmetry?

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Which triangle has 3 lines of symmetry?

• equilateral

• scalen

• isosceles

• none. it's impossible for a triangle to have a line of symmetry

Which triangle has only 1 line of symmetry?

• equilateral

• scalen

• isosceles

• none. it's impossible for a triangle to have a line of symmetry