Shape 0.0 / 5 ? MathematicsAngles2D and 3D shapeGCSEAQA Created by: lh1002Created on: 02-06-16 17:18 How do you find the sum of all interior angles in a polygon? (n-2) x 180° 1 of 16 How do you find one interior angle in a regular polygon? sum of interior angles / number of sides 2 of 16 How do you find one interior angle in an irregular polygon? Find the sum of all the interior angles and take away all other given angles in the shape. 3 of 16 What is the total of all exterior angles in a polygon? 360° 4 of 16 How do you find one exterior angle in a polygon? 180° - interior angle or 360 / number of sides (FOR REGULAR POLYGONS ONLY) 5 of 16 How do you find the area of a rectangle? base x height 6 of 16 How do you find the area of a parallelogram? base x height 7 of 16 How do you find the area of a triangle? base x height / 2 8 of 16 How do you find the area of a trapezium? (a + b) / 2 x height 9 of 16 How do you find the area of a circle? 'pi'r² 10 of 16 How do you find the circumference of a circle? 'pi'd or 2'pi'r 11 of 16 What is a 'Z' angle called and what are the properties of its angles? Alternate, angles are equal 12 of 16 What is a 'F' angle called and what are the properties of its angles? Corresponding, angles are equal 13 of 16 What is a 'C' angle called and what are the properties of its angles? Co-interior, angles add up to 180° 14 of 16 What three things do you have to remember when finding a bearing? They are always measured from North; they are always measured clockwise; they are always written with 3 figures 15 of 16 When finding a bearing, where do you draw the North line? Where the question specifies you are finding the bearing from- the bearing of 'a' FROM 'b' 16 of 16

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