Third grades must be able to: measure to the nearest millimeter and ½ centimeter. measure to the nearest ¼ and ½ inch. understand what unit of measure to use for both metric and customary measurement systems: inches or feet, yards or miles, or millimeters or kilometers. find the perimeter of a regular or irregular polygon. find the perimeter of a regular polygon when one side is provided. find the missing length when the width of a rectangle is given and vice versa.

inch – a standard unit of length used for small objects or lengths foot – a standard unit of length which equals 12 inches yard – a standard unit of length which equals 36 inches millimeter (mm) – a metric unit of length equal to 1/10 of a centimeter centimeter (cm) – a metric unit of length equal to 10 millimeters meter (m) – a metric unit of length equal to 100 centimeters measure – to find out the size of something length – the distance from one end of any object to the other, or how long something is width – the measure of an object from side to side, or how wide something is distance – the amount of space between two places kilometer – a metric unit of length used to measure distances (ex: distance from Houston to Dallas) mile – a standard unit of length used to measure distances (ex: distance from Houston to Dallas) height – a measurement of how high something is perimeter – the measurement around the outside of a polygon

5 11 This trapezoid has a perimeter of 35 feet. The length of one of the sides is missing. What is the missing length? 11 A.5 B.8 C.9 D.7

Which one of the following is an example of when to use perimeter? A.Measuring yarn B.framing a picture C.Wrapping a present D.Mopping the floor

If the length of the swimming pool is 12, what is the width? A. 9 feet B. 8 feet C. 4 feet D.12 feet W 12

Mrs. Roberts-Bessette is creating a sidewalk around her regular pentagon birdcage. One of the sides measures 2 meters. What is the perimeter of the birdcage? A.20 meters B.10 meters C. 2 meters D. 4 meters

Ms. Roberts needs to find out the perimeter of her living room in order to buy a new rug. What unit of measurement would she use to find the perimeter of her living room? A.millimeters B.feet C.kilometers D.centimeters

Liam’s fishtank has a perimeter of 54 inches. The length is of the tank is 15 inches, what is the width of the glass? A.11 inches B.15 inches C.12 inches D.10 inches

Mrs. Berner is putting up a wooden fence for her garden in her backyard in the shape of a regular hexagon. One of the sides measures 4 meters. What is the perimeter of the wooden fence? A.20 meters B.4 meters C.34 meters D.24 meters

What is the difference between the perimeter of shape A and the perimeter of shape B? 30ft 50 ft A.20 ft B.100 ft C.80 ft D.320 ft

What is the difference between the perimeter of shape A and the perimeter of shape B? 10ft A.10 ft B.20 ft C.80 ft D.40 ft 40 ft 20 ft

Mrs. Sieg is measuring her seed box. She thinks that it measures 8 ½ cm. Is she correct? Why or Why not?

What is the perimeter of the tiled floor? A.28 B.22 C.20 D.23

What is the perimeter?

Mrs. Head has a packet of sugar. She says that it is 62 millimeters. Mrs. Korkus says that it is 6 centimeters and 2 millimeters. Who is correct? Why?

How long is the seed box? A.8 ½ cm B.5 ½ cm C.6 cm D.3 cm

What is the perimeter?

Mrs. Sieg’s measures her sugar packet. How long is it? A.4 cm B.3 cm C.5 cm D.6 cm

What is the height of the leprechaun? A.4 ½ inches B.15 cm C.5 feet D. 4 inches

What is the length of the packet of Cilantro? A.10 cm B. 9 cm C. 8 cm D. 2 cm