Lesson T4.3.3
T4.3.3 Angles in triangles and polygons Quiz: KS3 Maths, Unit 4
20 questions
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Lesson T4.3.3, Angles in triangles and polygons: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 4: Geometry and measures, written with Revision Ninja.
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The 20 questions
-
Angles in a triangle add up to how many degrees?
- 360 degrees
- 180 degrees
- 270 degrees
- 90 degrees
-
Angles in a quadrilateral add up to how many degrees?
- 180 degrees
- 720 degrees
- 540 degrees
- 360 degrees
-
A triangle has angles of 50 degrees and 60 degrees. What is the third angle?
- 110 degrees
- 70 degrees
- 130 degrees
- 80 degrees
-
Each angle in an equilateral triangle is what size?
- 90 degrees
- 45 degrees
- 30 degrees
- 60 degrees
-
An isosceles right-angled triangle has a 90 degree angle. What is each base angle?
- 90 degrees
- 45 degrees
- 30 degrees
- 60 degrees
-
What is the sum of the interior angles of a pentagon?
- 720 degrees
- 900 degrees
- 540 degrees
- 360 degrees
-
What is the size of each interior angle of a regular octagon?
- 135 degrees
- 150 degrees
- 120 degrees
- 108 degrees
-
What is the size of each interior angle of a regular hexagon?
- 60 degrees
- 120 degrees
- 135 degrees
- 108 degrees
-
Each exterior angle of a regular 10-sided polygon is what size?
- 36 degrees
- 18 degrees
- 72 degrees
- 144 degrees
-
A triangle has angles x, 2x and 3x. What is the largest angle?
- 30 degrees
- 120 degrees
- 90 degrees
- 60 degrees
-
A quadrilateral has angles 90, 90, 100 and x degrees. What is x?
- 90
- 80
- 70
- 100
-
A pentagon has four angles of 100, 110, 120 and 130 degrees. What is the fifth angle?
- 100 degrees
- 70 degrees
- 80 degrees
- 90 degrees
-
A triangle has two angles of 70 degrees. What is the third angle?
- 50 degrees
- 40 degrees
- 140 degrees
- 35 degrees
-
A triangle has angles 35 degrees and 85 degrees. What is the third angle?
- 50 degrees
- 80 degrees
- 70 degrees
- 60 degrees
-
Which polygon has interior angles that add up to 1440 degrees?
- Octagon (8 sides)
- Decagon (10 sides)
- Dodecagon (12 sides)
- Nonagon (9 sides)
-
A regular polygon has interior angles of 150 degrees. How many sides does it have?
- 8
- 10
- 12
- 6
-
A triangle has angles of 25 degrees and 95 degrees. What is the third angle?
- 60 degrees
- 70 degrees
- 50 degrees
- 85 degrees
-
When one side of a triangle is extended, the exterior angle equals what?
- The sum of the two opposite interior angles
- The sum of all three interior angles
- Half the smallest interior angle
- Twice the largest interior angle
-
What is the exterior angle formed when a triangle side is extended, if the two opposite interior angles are 45 degrees and 75 degrees?
- 30 degrees
- 180 degrees
- 60 degrees
- 120 degrees
-
A quadrilateral has angles 70 degrees, 110 degrees and 80 degrees. What is the fourth angle?
- 100 degrees
- 80 degrees
- 110 degrees
- 90 degrees
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