Sec 1 Express Mathematics
Chapter 14:
Perimeter and Area of Plane Figures
Sec 1 Express Mathematics
ICT Lesson Outline14.1: Revision on area of triangles, rectangles, squares, circles.
Perimeter & Area of Parallelogram
14.2: Perimeter & Area of Trapezium
14.3: Perimeter & Area of Parallelogram
Sec 1 Express Mathematics
14.2 Introduction to Trapeziums
A trapezium is • a 4-sided flat shape with straight sides • a pair of opposite sides parallel
Sec 1 Express Mathematics
Area of trapezium
Watch this video:https://www.youtube.com/watch?v=UYrhj3h35sU
Sec 1 Express Mathematics
Area of trapeziumHow the formula is obtained? (optional)
Sec 1 Express Mathematics
Area of trapeziumHow the formula is obtained? (optional)
Sec 1 Express Mathematics
Summary: Area of trapezium
= 1/2 x (sum of parallel sides) x height
Sec 1 Express Mathematics
Practice question (1)
Solution:
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Sec 1 Express Mathematics
Practice question (2)
Solution:
Sec 1 Express Mathematics
Perimeter of trapezium
Perimeter = Sum of all 4 sides = a + b + c + d