Area of a Rectangle
What is the formula for area?
A=lxw
What is the formula for the area of a triangle?
A=bxh/2
Use box multiplication to solve:
836 x 24
20064
Convert:
26m to cm
2600cm
P = 2(l+w)
A rectangle has an area of 72m^2. If the length is 3m, what is the width?
24m
A rectangle has a width of 12cm and a length of 18cm. What would the area of it's matching triangle be?
108cm^2
Use lattice multiplication to solve:
254 x 223
56642
Convert:
8.76km to m
8760m
A square has a length of 5m. What is the perimeter?
20m
A rectangle has a width of 100m, and a length of 1200cm. What is the area in m?
1200m^2
A triangle has a width of 12cm and a length of 10cm. Can you solve for area? Why?
No
Use mental math to solve:
21 x 19
399
Convert:
692g to mg
692000mg
A triangle has a perimeter of 56cm. Side A is 24cm, Side B is 7cm, how long is side C?
25cm
Which rectangle has a larger area?
Rectangle A: length = 6cm, width = 10cm
Rectangle B: length = 3 cm, width = 20cm
a) Rectangle A
b) Rectangle B
c) They have the same area
c
Is the formula for area of triangles the same for all types of triangles (i.e. right, acute, obtuse)?
Yes
How much greater is 39 x 42 than 39 x 41?
39
Covert:
435mL to L
0.435L
True or false:
You use perimeter when calculating how much tile you need to cover a room.
False
A cube has 6 equal faces. One face has a length of 4m and a width of 4 m. What is the surface area of the entire cube?
96m^2
A triangle has an area of 638cm^2, and a base of 2m. What is the height in m?
3.19m
How much greater is 13 x 14 than 12 x 15?
2
93km to cm
9300000cm
True or false:
You use perimeter to calculate how much material you need to build a fence.
True