AQA · Mathematics · 8300
GCSE Maths: Angles: right angle
Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths practice questions for Angles: right angle (Corbettmaths Video 34), 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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What is the sum of the interior angles of any quadrilateral?
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360°
What is the sum of the interior angles of any triangle?
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180°
In an isosceles triangle, which angles are equal?
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The two base angles (the angles opposite the two equal sides).
In a parallelogram, what relationship exists between opposite angles?
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Opposite angles are equal.
Why can a triangle NOT have one reflex angle and two acute angles?
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A reflex angle is greater than 180°, but the sum of all three angles in a triangle must equal 180°.
Why can a triangle NOT have two obtuse angles and one acute angle?
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Two obtuse angles would sum to more than 180°, but the sum of all three angles in a triangle must equal exactly 180°.
What is the measure of a right angle?
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90°
When two straight lines intersect, what relationship exists between vertically opposite angles?
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Vertically opposite angles are equal.
What angles must sum to 180° along a straight line?
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All angles along a straight line sum to 180° (angles on a straight line are supplementary).
If an isosceles triangle has one angle of 84°, what are the two possible configurations for the other angles?
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Either the 84° is one of the equal angles (giving 84°, 84°, 12°) or it's the unique angle (giving 84°, 48°, 48°).
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