TAILIEUCHUNG - Lecture General mathematics: Lecture 24 - Ms. Fehmida Haroon

The main contents of this chapter include all of the following: Definitions and examples, absolute extrema of functions on closed and bounded intervals, absolute extrema of functions with one relative extremum, other cases: using limits. | General Mathematics ADE 101 Unit 3 LECTURE No. 24 AREA Today’s Objectives Knowledge Test Length Definition: The measure of the distance across an figure. 4 Area is the amount of surface space that a flat object has. Area is reported in the amount of square units. Area Definition: The number of square units needed to cover a surface. (INSIDE) Length x width Area Area of a Square You find the area of a square by multiplying the side by itself. 3 Find the area of these squares. 5 12 25 8 16 Counting each square can take a long time. Does anyone know a quicker way? The area of the shape is 48cm2. The rectangle is made of 6 rows of 8 squares. To work out the number of squares we times 6 by 8. Find the area of these rectangles. 1 2 2 3 3 4 5 6 What is the area of each of these shapes? Your teacher will give you copy of the worksheet. 20cm2 18cm2 14cm2 30cm2 22cm2 We can work out the area of a rectangle without the grid. length width Area = length x width Area of a Rectangle The area of a rectangle is determined by multiplying length x width. 2 x 4 = 2 4 Area of a Square or Rectangle 2 x 4 = 8 2 4 Now work out the area of these rectangles. They are not drawn to scale. 36cm2 35cm2 20cm2 25cm2 4cm 9cm 7cm 5cm 5cm 4cm 2cm The area of a shape is the amount of space inside it. The area of the shape is 18cm2. To find out how much shape is inside we can count the squares. Area of a Triangle Sometimes it makes it easier to remember if you can imagine it like this: 3 4 A triangle is half of a rectangle or square. This is because the base (4) x the height (3) would be the same as the length x the width of a rectangle. Area of a Triangle Finding the area of a triangle is different. Area of a triangle = ½ (base x height) ***(Base x height) is the same as (length x width).*** 3 4 Base Definition: A side or face of a figure on which the figure stands. 22 Height Definition: The distance from the bottom to the top of a figure. Width Definition: How wide a figure is from .

• Toán học
• General mathematics
• Lecture General mathematics
• Geometric measurement
• Algebraic thinking
• Mathematical knowledge
• Constant functions
• Number pattern
• Cartesian coordinate system
• Liner equations
• Graph of liner equations
• Linear equation
• Natural numbers