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CONES PYRIMIDS AND Jim Smith JCHS. PARTS OF A PYRIMID ( SQUARE BASE ) BASE EDGE HEIGHT ( h ) SLANT HEIGHT ( l )

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Presentation on theme: "CONES PYRIMIDS AND Jim Smith JCHS. PARTS OF A PYRIMID ( SQUARE BASE ) BASE EDGE HEIGHT ( h ) SLANT HEIGHT ( l )"— Presentation transcript:

1 CONES PYRIMIDS AND Jim Smith JCHS

2 PARTS OF A PYRIMID ( SQUARE BASE ) BASE EDGE HEIGHT ( h ) SLANT HEIGHT ( l )

3 PARTS OF CONES HEIGHT ( h ) r SLANT HEIGHT ( l )

4 LA = ½ p l SA = LA + B VOL= B h

5 FIND THE PERIMETER AND AREA FIRST AND AREA FIRST 12 Base edge h sl P = = 48 B = 12 x 12 = 144 LA = ½ p l = ½ x 48 x 10 = 240 sq un SA = LA + B = = 384 sq un VOL = B x h = 144 x 8 = 384 cu un

6 3 r h sl p = 2 π r = 2 π 3 = 6 π B = π r² = π 3² = 9 π LA = ½ p l = ½ x 6 π x 5 = 15 π sq un SA = LA + B = 15 π + 9 π = 24 π sq un VOL = B h = x 9 π x 4 = 12 π cu un


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