KS3 shapes angles - the difference between obtuse and acute

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Maths Quiz - Level 5-6 Shapes - Angles (Questions)

Shapes. They form an important part of KS3 Maths. There are many aspects to shapes, like sides, corners and area. This quiz looks at angles.

There are certain 'rules' about angles. For example, the angles in a triangle always add up to 180^o. There are also different names for different types of angles - acute, right-angled, obtuse and reflex.

Can you tell an acute angle from an obtuse angle? Do you know how many degrees there are in a circle or in a square? Are you familiar with the angles of a regular pentagon or a regular hexagon? Well, this quiz will find out!

The ten questions that follow will test your knowledge of angles. Take your time and read each question carefully before choosing your answers. And don't forget to read the helpful comments after each question. They might help you gain an acute knowledge of angles.

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[ ]	right angle

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[ ]	right angle

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[ ]	right angle

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[ ]	right angle

What is 'angle A' in the diagram below?

[ ]	80^o
[ ]	100^o
[ ]	120^o
[ ]	140^o

What is 'angle A' in the diagram below?

[ ]	90^o
[ ]	180^o
[ ]	210^o
[ ]	270^o

What is 'angle A' in the diagram below?

[ ]	55^o
[ ]	65^o
[ ]	75^o
[ ]	85^o

What is 'angle A' in the equilateral triangle below?

[ ]	50^o
[ ]	60^o
[ ]	70^o
[ ]	80^o

What is 'angle A' in the regular pentagon below?

[ ]	80^o
[ ]	88^o
[ ]	92^o
[ ]	108^o

10.

What is 'angle A' in the regular hexagon below?

[ ]	80^o
[ ]	120^o
[ ]	180^o
[ ]	240^o

You can find more about this topic by visiting BBC Bitesize - Angles

Maths Quiz - Level 5-6 Shapes - Angles (Answers)

The angle in the picture below is a(n) .......

[x]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[ ]	right angle

Acute angles are less than 90^o

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[ ]	reflex angle
[x]	right angle

Right angles are exactly 90^o

The angle in the picture below is a(n) .......

[ ]	acute angle
[x]	obtuse angle
[ ]	reflex angle
[ ]	right angle

Obtuse angles are between 90^o and 180^o

The angle in the picture below is a(n) .......

[ ]	acute angle
[ ]	obtuse angle
[x]	reflex angle
[ ]	right angle

Reflex angles are between 180^o and 360^o

What is 'angle A' in the diagram below?

[ ]	80^o
[ ]	100^o
[x]	120^o
[ ]	140^o

The angles on a straight line add up to 180^o

What is 'angle A' in the diagram below?

[ ]	90^o
[ ]	180^o
[ ]	210^o
[x]	270^o

The angles in a circle add up to 360^o

What is 'angle A' in the diagram below?

[ ]	55^o
[ ]	65^o
[x]	75^o
[ ]	85^o

90^o + 195^o + 75^o = 360^o

What is 'angle A' in the equilateral triangle below?

[ ]	50^o
[x]	60^o
[ ]	70^o
[ ]	80^o

The angles in a triangle add up to 180^o

What is 'angle A' in the regular pentagon below?

[ ]	80^o
[ ]	88^o
[ ]	92^o
[x]	108^o

All angles in a regular pentagon are the same. (The length of the sides are also the same)

10.

What is 'angle A' in the regular hexagon below?

[ ]	80^o
[x]	120^o
[ ]	180^o
[ ]	240^o

Remember that all the angles in a regular hexagon are the same and all the lengths of the sides are the same