AQA · Mathematics · 8300
GCSE Maths: Angles: straight line
Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths practice questions for Angles: straight line (Corbettmaths Video 35), 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 a quadrilateral?
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360°
What is the sum of the interior angles of a triangle?
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180°
Can a triangle have one reflex angle and two acute angles?
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No. A triangle's interior angles sum to 180°, and a single reflex angle (>180°) would already exceed this total.
Can a triangle have two obtuse angles and one acute angle?
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No. Two obtuse angles (each >90°) would sum to more than 180°, exceeding the total for all three angles in a triangle.
In an isosceles triangle, which angles are equal?
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The two base angles (the angles opposite the equal sides) are equal.
What is the sum of angles on a straight line?
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180°
In a parallelogram, what is the relationship between opposite angles?
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Opposite angles are equal.
If the three angles in a triangle are in the ratio 2:6:7, what is the size of the smallest angle?
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24°. (Total parts = 2+6+7 = 15; each part = 180°/15 = 12°; smallest = 2×12° = 24°)
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