Angles - Term 1 Flashcards

1
Q

What is the rule for angles on a straight line?

A

Angles on a straight line add up to 180*

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2
Q

What is the rule for angle around a point?

A

Angles around a point add up to 360*

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3
Q

What is the rule for vertically opposite angles?

A

Vertically opposite angles are equal

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4
Q

What is the rule for angles on a triangle?

A

Angles on a triangle add up to 180*

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5
Q

What is the rule about isosceles triangles

A

An isosceles triangle has two equal sides (lengths) and two equal base angles

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6
Q

What is the rule for angles on a quadrilateral?

A

Angles on a quadrilateral add up to 360*

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7
Q

What’s the rule for quadrilaterals to do with triangles?

A

All quadrilaterals can be split int two to make two triangles

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8
Q

What are co-interior angles in relationship to each other?

A

Co interior angles add up to 180*

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9
Q

What does it mean for a shape to be regular?

A

All sides are the same shape and all angles are the same size

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10
Q

How many sides does a pentagon have?

A

5

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11
Q

How many sides does a hexagon have?

A

6

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12
Q

How many sides does a heptagon have?

A

7

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13
Q

How many sides does a octagon have?

A

8

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14
Q

How many sides does a nonagon have?

A

9

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15
Q

How many sides does a decagon have?

A

10

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16
Q

What do an interior angle and an exterior angle add up to?

A

180*

17
Q

What do the exterior angles of a polygon add up to?

A

360*

18
Q

A 91 degree angle is an example of a / an _________ angle?

A

An Obtuse Angle

An obtuse angle is an angle of size between 90 and 180 degrees

19
Q

Explain two differences between a scalene and an isosceles triangle?

A

A scalene triangle shown has 3 sides of different lengths and 3 angles of different size

The isosceles triangle shown has two equal sides and two equal angles.

20
Q

Use each word from below ONCE to complete what follows:-

Quadrilateral Four sides. Rectangle Square. Flat

A ________ is an example of a ________ shape because it has no thickness.
It is also grouped as a __________ because it has _______________.
Another shape in this group, the ___________.has two longer and two shorter pairs of dimensions.

A

A square is an example of a flat shape because it has no thickness.
It is also grouped as a quadrilateral because it has four sides.
Another shape in this group, the rectangle, has two longer and two shorter pairs of dimensions.