The cards Question In a transformation, what is the object? Tap to flip Answer The starting figure before the transformation is applied. Question In a transformation, what is the image? Tap to flip Answer The resulting figure after the transformation is applied. Question When are two shapes similar? Tap to flip Answer When the only difference between them is their size; their side lengths are in the same proportions. Question What is a scale factor? Tap to flip Answer The multiplier between similar shapes that describes how large one is compared to the other. Question When is a property of a shape invariant? Tap to flip Answer When it has not changed after the shape is transformed. Question What does an enlargement mean? Tap to flip Answer A change in size. Question Do the angles inside an object change when it is enlarged? Tap to flip Answer No. Question When an object is enlarged, how is the image related to it? Tap to flip Answer The image is similar to the object. Question Which three transformations produce an image congruent to the object? Tap to flip Answer Translation, reflection and rotation. Question What does a rotation involve? Tap to flip Answer Turning the shape about a defined point. Question What does a reflection involve? Tap to flip Answer Flipping the shape. Question What does a translation involve? Tap to flip Answer Moving the shape. Question Must congruent shapes have the same orientation? Tap to flip Answer No. Question If two shapes are congruent, are they also similar? Tap to flip Answer Yes. Question What is the scalar between congruent shapes? Tap to flip Answer One. Question Are all similar shapes congruent? Tap to flip Answer No. Congruent shapes are a set inside the set of similar shapes, not the other way round. Question What is the order of rotational symmetry? Tap to flip Answer The number of times the image looks the same as the object in one full turn. Question When counting the order of rotational symmetry, what must you avoid counting twice? Tap to flip Answer The starting position. Question Under SSS, what must be known about a triangle and its image to prove congruence? Tap to flip Answer The three side lengths. Question Under SAS, what must be known to prove two triangles congruent? Tap to flip Answer Two side lengths and the angle between them. Question For SAS, must the known angle be between the two known sides? Tap to flip Answer Yes. Otherwise more than one triangle can sometimes be formed. Question Under ASA or AAS, what must be known to prove two triangles congruent? Tap to flip Answer Two angles and a length. Question What is the hypotenuse? Tap to flip Answer The side of a right-angled triangle opposite the right angle. Question Under RHS, which sides of a right-angled triangle are needed to prove congruence? Tap to flip Answer The hypotenuse and one other side. Question Can you assume an angle is a right angle because the edges look perpendicular? Tap to flip Answer No. Question What does Pythagoras' theorem state? Tap to flip Answer In a right-angled triangle, the sum of the squares of the two shorter sides equals the square of the hypotenuse. Question What would a demonstration of Pythagoras' theorem show? Tap to flip Answer That it works for specific right-angled triangles. Question Which arrangement is used in the generalised proof of Pythagoras' theorem? Tap to flip Answer Four congruent triangles arranged in a particular way inside a square. Question How can Pythagoras' theorem be shown with three squares on a triangle's sides? Tap to flip Answer The areas of the two smaller squares add up to the area of the larger square. Question Which side of a right-angled triangle is always the longest? Tap to flip Answer The side opposite the right angle (the hypotenuse). Question What is a Pythagorean triple, conventionally? Tap to flip Answer A trio of integer side lengths of a right-angled triangle, e.g. 3, 4, 5. Question How do you get the square of an unknown shorter side of a right-angled triangle? Tap to flip Answer Subtract the square of the known shorter side from the square of the longest side. Question Does it matter which shorter side is labelled a and which b in Pythagoras' theorem? Tap to flip Answer No. Question What is the perpendicular height? Tap to flip Answer The perpendicular distance from the base to the opposite vertex. Question Do you need to be given a triangle to use Pythagoras' theorem? Tap to flip Answer No. You can sketch one from the given information. Question Does every question with a right-angled triangle need Pythagoras' theorem? Tap to flip Answer No. Some ask for areas or angles without it. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage Key stage 3 (Years 7–9) Course KS3 Maths Unit Geometrical properties: similarity and Pythagoras' theorem 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 2026-11-03, 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.
Sources Total: 15 · primary: 15 · second publisher: 0
Show the other sources (13) Primary source Length of the hypotenuse (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Length of a shorter side (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Determining which side (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Pythagoras' theorem in context (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Problem solving with similarity and Pythagoras' theorem (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking understanding of congruence (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruence in shapes (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruent, similar or neither (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Rotational symmetry (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruent triangles (SSS) (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruent triangles (SAS) (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruent triangles (ASA and AAS) (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Congruent triangles (RHS) (opens in a new tab) (Oak National Academy, thenational.academy) Found a mistake? Write to support@flashfeed.app .
A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)
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