ANGLES

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• Angles in a straight line add up to 180 degrees
• Angles around a point (or in a circle = 360)

ALTERNATING (Z) ANGLES

• Opposite angles are equal only if:
• It's a Z (or N) shape
• 2 lines are parallel

CORRESPONDING (F) ANGLES

• 2 angles are equal only if:
• It's an F shape
• 2 lines are parallel

INTERIOR (U) ANGLES

• 2 angles add upto 180 degrees
• If it's a U shape
• With 2 parallel lines

TOTAL INTERIOR ANGLES

• To work out the total angle inside a polygon:
• 180 x (n-2)
• Eg. Triangle = 180
• Square = 360
• Pentagon = 540
• So what is 'n' ?
• Total angle in heptagon?

TOTAL EXTERIOR ANGLES

• Use all the hints and your new knowledge :D

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