Chp 6: PD 2

Question 1

Dy/dx (id)

Answer 1

Dy/dx = - fx/ fy

Question 2

Dz/ dx (id)

Answer 2

Dz/dx = -fx/fz

Question 3

Dz/dy (id)

Answer 3

Dz/dy = - fy/fz

Question 4

Error approximation formula (2 variables)

Answer 4

dz = fx (x node, y node) dx + fy (x node, y node) dy

Question 5

Error approximation formula (3 variables)

Answer 5

dz = fx (x node, y node) dx + fy (x node, y node) dy + fz ( x node, y node , z node) dz

Question 6

Formula for area of trapezium

Answer 6

A= 1/2(a+b)h

Question 7

Area of rhombus

Answer 7

A=LH/2

Question 8

Area of kite

Answer 8

A=LH/2

Question 9

Volume of pyramid

Answer 9

V= 1/3AH

Question 10

Volume of prism

Answer 10

V=AH

Question 11

SA of closed prism

Answer 11

SA= 2A+ (hxp)

Question 12

Volume of sphere

Answer 12

V= 4/3pi r^3

Question 13

Surface area of sphere

Answer 13

SA= 4 pi r^2

Question 14

Surface area of cylinder

Answer 14

SA= 2 pi r (r + h)

Question 15

Volume of cone

Answer 15

V= 1/3 pi r^2 h

Question 16

Surface area of cone

Answer 16

SA = pi r (r + S)

Question 17

Diagonal formula

Answer 17

D= ( a^2 + b^2 + c^2 )^1/2