week 10+11

what shape is the formula $$\pi r^2$$ in reference to?

calculate the surface area of the shape if we use the formula:
$$4\pi r^2$$
this is if we know R = 5cm

find the surface area of the following cube: we know the formula is 6a²

^{if we know that a = 13mm}

HARD: a circle has a circumference of 140mm.
$$circumference=\pi\times diameter$$

what is the circumference of the circle?

VERY HARD: a circle has a circumference of 120mm
using the formula $$c=\pi d$$

find the area of the circle!

Note: this will take multiple steps!

convert the following to degrees:
6.2 Radians

HARD: Using the triangle to the side we know that:
C = 30mm
A = 12 mm
i want us to calculate the volume! using the formula below:

$$Volume\ =\ \frac{1}{3}\pi r^2\times h$$

if C = 130mm and A = 14mm what is the length of B?

VERY HARD: if A = 25cm
and Q = 32^o

find C

note: remember SOHCAHTOA!

if C = 34cm and A = 12cm
find Q

NOTE: remember to use SOHCAHTOA