11 B3 MATHS 5TH FEB 2010

N. Stott

Use your revision cards to remember the formulae for… The area of a circle The circumference of a circle The area of a triangle The area of a parallelogram The area of a trapezium The area of a rectangle The volume of a cuboid The volume of a prism

1.Area of a Triangle

bh2

1 Area

2. Area of a Rectangle

WidthLength Area

3. Area of a Circle

2 Area r

4. Area of a Parallelogram

bh Area

5. Area of a Trapezium

2

)( Area

hBA

6. Circumference of a Circle

r2 C

7. Volume of a Cuboid

Height WidthLength Volume

8. Volume of a Prism

Length Area Volume

Solving Equations Mixed Exercise1. y + 7 = 202. 7x = 843. 8y -3 =294. 3x-10 = 2x-35. 4(3x-1) = 3(3x+2)

Q1 & Q2 Solutions

y+7 = 20y=20-7y=13

7x = 84x=84/7x=12

Q3 Solution

8y-3=298y=29+3

8y=32y=32/8

y=4

Q4 & Q5 Solution

3x-10 = 2x-33x – 2x = -3 +10

x = 7

4(3x-1) = 3(3x+2)12x-4 = 9x+612x-9x = 6+4

3x=10x=10/3 or 3 1/3

Homework For Monday 8th

GCSE Maths Work Book Page 78 Questions 1-3