The cards Question What is an angle? Tap to flip Answer A measure of turn, often shown as the rotation between two line segments. Question What is a reflex angle? Tap to flip Answer An angle greater than a straight line, i.e. greater than 180°. Question In what unit does a protractor measure angles? Tap to flip Answer Degrees. Question What do angles that meet around a point sum to? Tap to flip Answer 360° Question Which angles on a straight line sum to 180°? Tap to flip Answer Angles that meet about a single point on the line; non-adjacent angles may not. Question What is true of vertically opposite angles? Tap to flip Answer They are equal. Question What is a transversal? Tap to flip Answer A line, line segment or ray that intersects two or more lines at distinct points. Question What are corresponding angles? Tap to flip Answer A pair of angles at different vertices on the same side of a transversal, in equivalent positions. Question When are corresponding angles equal? Tap to flip Answer When they are on parallel lines, on the same side of the transversal. Question What are alternate angles? Tap to flip Answer A pair of angles, both between or both outside two line segments, on opposite sides of the transversal that cuts them. Question Are alternate angles always equal? Tap to flip Answer No. They are equal when the transversal crosses parallel lines; if the lines are not parallel, they are not equal. Question What are co-interior angles? Tap to flip Answer Angles on the same side of the transversal and between the two other lines. Question What do supplementary co-interior angles sum to? Tap to flip Answer 180° Question What is a parallelogram? Tap to flip Answer A quadrilateral with two pairs of parallel and equal sides. Question What is a rhombus? Tap to flip Answer A parallelogram whose sides are all the same length. Question What is a trapezium? Tap to flip Answer A quadrilateral with exactly one pair of parallel sides. Question What is an equilateral triangle? Tap to flip Answer A triangle with three equal angles and three equal sides: a regular triangle. Question What is an isosceles triangle? Tap to flip Answer A triangle with two equal angles and two sides of equal length. Question Can angle facts be used with shapes, whose sides are line segments? Tap to flip Answer Yes. What matters is the properties of the lines, such as being parallel, not their length. Question What is a regular polygon? Tap to flip Answer A polygon whose sides are all equal and whose interior angles are all equal. Question What is an irregular polygon? Tap to flip Answer A polygon whose sides are not equal or whose interior angles are not equal. Question Is an irregular five-sided polygon still a pentagon? Tap to flip Answer Yes. A shape's name depends on its number of sides, which need not be regular. Question What is an interior angle? Tap to flip Answer An angle formed inside a polygon by two of its edges. Question What can any polygon be split into to show the rule for its interior angle sum? Tap to flip Answer Triangles. Question Does the sum of a polygon's interior angles depend on whether it is regular? Tap to flip Answer No. The sum is the same whether or not the polygon is regular. Question What can be determined about a regular polygon from the size of its interior angle? Tap to flip Answer Its number of sides. Question What is an exterior angle of a polygon? Tap to flip Answer The angle outside the polygon between an extension of an edge and the adjacent edge. Question What is true of an exterior and interior angle pair of a polygon? Tap to flip Answer They are supplementary. Question Is an exterior angle equal to 360° minus the interior angle? Tap to flip Answer No. It is the angle between an extension of an edge and the adjacent edge. Question When forming equations with angles, how can a missing angle be represented? Tap to flip Answer With an unknown. Question When solving an angle problem, can you add lines to the given diagram? Tap to flip Answer Yes. Extending line segments and adding notation or found information often helps. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Maths Unit Angles Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)
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