Unit 13 Areas Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms.

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Presentation transcript:

Unit 13 Areas Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms and Kites Presentation 4Surface Area

Unit 13 Areas Formula for Area

Square Area = a x a = a 2 Side: a

Rectangle Area = a x b = ab Sides: a, b

Triangle Area = Base: b Perpendicular height: h

Complete the table ?? ?? ?? ?? 3 cm 5 cm 12 cm 6 cm

Complete the table ?? ?? ?? ?? ?

Unit 13 Areas You have finished viewing: Formula for Area Return to front slide Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms and Kites Presentation 4Surface Area

Unit 13 Areas Areas and Circumferences of Circles

Area: or Area: or Circle Radius: r Diameter: d Circumference: or Circumference: or

ExampleFind the circumference and the area of the circle with radius 4 cm Circumference Area ? ? ? ? ?

Unit 13 Areas You have finished viewing: Areas and Circumferences of Circles Return to front slide Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms and Kites Presentation 4Surface Area

Unit 13 Areas Formulae for Areas of Parallelograms, Trapeziums and Kites

Parallelogram Area = b x h = bh

Trapezium Area =

Kite Area =

Complete the table ?? ? ? ? ? ?

Unit 13 Areas You have finished viewing: Formula for Areas of Trapeziums, Parallelograms and Kites Return to front slide Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms and Kites Presentation 4Surface Area

Unit 13 Areas Surface Area

x y z unfolds 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 ?? ? ? ?

Area of the circles Area of the rectangle Total surface area r h unfolds to give ?? ? ? ? ?? ??

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 cm When r = 3 cm, h = 10 cm ? ? ?? ???

Unit 13 Areas You have finished viewing: Surface Area Return to front slide Presentation 1Formula for Area Presentation 2Areas and Circumferences of Circles Presentation 3Formula for Areas of Trapeziums, Parallelograms and Kites Presentation 4Surface Area