AQA · Mathematics · 8300
GCSE Maths: Triangles: types of
Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths textbook exercise and practice questions for Triangles: types of (Corbettmaths Video 327), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.
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How many equal sides does an equilateral triangle have?
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3 equal sides.
How many equal sides does an isosceles triangle have?
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2 equal sides.
How many equal sides does a scalene triangle have?
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0 equal sides (all sides are different lengths).
What special angle does a right-angled triangle contain?
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One 90° angle (a right angle).
What are the three angles in an equilateral triangle?
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60°, 60°, and 60° (all angles are equal).
How many lines of symmetry does an isosceles triangle have?
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1 line of symmetry.
Which type of triangle has the most lines of symmetry?
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Equilateral triangle (3 lines of symmetry).
How many lines of symmetry does a scalene triangle have?
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0 lines of symmetry.
Why can't a triangle have one acute, one right, and one obtuse angle?
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The angles of a triangle must sum to 180°. An obtuse angle (>90°) plus a right angle (90°) already exceeds 180°.
A triangle has sides of 5cm, 5cm, and 8cm. What type of triangle is it?
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Isosceles triangle (it has exactly 2 equal sides).
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