Angles - Term 1 Flashcards
What is the rule for angles on a straight line?
Angles on a straight line add up to 180*
What is the rule for angle around a point?
Angles around a point add up to 360*
What is the rule for vertically opposite angles?
Vertically opposite angles are equal
What is the rule for angles on a triangle?
Angles on a triangle add up to 180*
What is the rule about isosceles triangles
An isosceles triangle has two equal sides (lengths) and two equal base angles
What is the rule for angles on a quadrilateral?
Angles on a quadrilateral add up to 360*
What’s the rule for quadrilaterals to do with triangles?
All quadrilaterals can be split int two to make two triangles
What are alternative angles in relationship to each other?
Alternative angles are equal
What letters should you look for to find alternative angles?
Z and S
What letters should you look for to find corresponding angles?
F
What letters should you look for to find co-interior angles?
C
What are corresponding angles in relationship to each other?
Corresponding angles are equal to each other
What are co-interior angles in relationship to each other?
Co interior angles add up to 180*
What does it mean for a shape to be regular?
All sides are the same shape and all angles are the same size
What’s an easy way to work out the number of triangles in a shape?
Number of sides -2
How many sides does a pentagon have?
5
How many sides does a hexagon have?
6
How many sides does a heptagon have?
7
How many sides does a octagon have?
8
How many sides does a nonagon have?
9
How many sides does a decagon have?
10
What is the equation to work out the interior angles in a shape?
(Number of sides - 2) x 180*
What do an interior angle and an exterior angle add up to?
180*
What do the exterior angles of a polygon add up to?
360*
