math unit13 areas
TRANSCRIPT
Unit 13Areas
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area
Unit 13Areas
Formula for Area
Square
Area = a x a = a2
Side: a
Rectangle
Area = a x b = ab
Sides: a, b
Triangle
Area =
Base: bPerpendicular height: h
Complete the table
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3 cm
5 cm
12 cm
6 cm
Complete the table
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Unit 13Areas
You have finished viewing:
Formula for Area
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area
Unit 13Areas
Areas and Circumferences of Circles
Area:or
Circle
Radius: rDiameter: d
Circumference:or
Example Find the circumference and the area of the circle with radius 4 cm
Circumference
Area
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Unit 13Areas
You have finished viewing:
Areas and Circumferences of Circles
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area
Unit 13Areas
Formulae for Areas of Parallelograms, Trapeziums and
Kites
Parallelogram
Area = b x h = bh
Trapezium
Area =
Kite
Area =
Complete the table
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Unit 13Areas
You have finished viewing:
Formula for Areas of Trapeziums, Parallelograms and Kites
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area
Unit 13Areas
Surface Area
xy
zunfolds
to give
The surface area is:
Find the surface area of the cuboid with sides 4 cm, 5 cm and 6 cm.When x = 4, y = 5, z = 6
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Area of the circles
Area of the rectangle
Total surface area
r
h
unfolds
to give
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Area of the circles
Area of the rectangle
Total surface area
Find the surface area of a can of height 10 cm and radius 3 cmWhen r = 3 cm, h = 10 cm
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Unit 13Areas
You have finished viewing:
Surface Area
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area