Comparing Units of Measurement
17 cm = ____ mm
170 mm
Which unit would you use to measure the length of a feather?
cm
How do you find the perimeter of a rectangle?
add side + side + side + side
How do you find the area of a rectangle?
multiply length x width
A right angle measures ___°
90°
50 mm = ____ cm
5 cm
Which unit would you use to measure the width of our classroom?
m
Blake wants to build a rectangular patio with a perimeter of 28 cm. What could each side length be?
various answers acceptable!
The four side lengths of Owen's desk are:
50 cm, 50 cm, 40 cm, 40 cm
What is the area of Owen's desk?
a = l x w
= 50 x 40
= 2000 cm²
An angle that is less that 90° is called an ___________
acute angl
5 m = ____ cm
500 cm
Which unit would you use to measure the width of a slice of bread?
mm
If you had a rectangle that was 12 cm long and 8 cm wide, what would the perimeter of the rectangle be?
p = s + s + s + s
= 12 + 12 + 8 + 8
= 40 cm
p = s + s + s + s
= 6 + 4 + 6 + 4
= 20 m
What is the area?
a = l x w
= 6 x 4
= 24 m²
An angle that is greater than 90° is called an _____________
obtuse angle
3 m = ____ mm
3000 mm
Which unit would you use to measure the distance from your house to Edmonton?
km
Ciara has 48 m of fencing to put around her square garden. What are the side lengths of her garden?
p = s + s + s + s
= 12 + 12 + 12 + 12
= 12 m
p = s + s + s + s
= 12 + 7 + 12 + 7
= 38 mm
What is the area?
a = l x w
= 12 x 7
= 84 mm²
Squares and rectangles are made up of ________ angles
right/90° angles
8400 mm = ____ m
8.4 m
Which unit would you use to measure the length of a staple?
mm
Koen's bedroom has two walls that measure 9 m and two walls that measure 6 m. What is the perimeter of Koen's room?
p = s + s + s + s
= 9 + 9 + 6 + 6
= 30 m
p = s + s + s + s
= 11 + 11 + 11 + 11
= 44 m
What is the area?
a = l x w
= 11 x 11
= 121 m²
The tool use to measure an angle is called _____________
a protractor