Perimeter
How would you define perimeter?
The distance around the outside of a 2-dimensional shape.
When you measure area, what part of the shape are you measuring?
The space inside the borders.
What is the value of x?
3x +4 = 13
3
When you measure surface area, what exactly are you measuring?
The total area of all the faces of a 3-dimensional object.
A fraction less than one is called a _________ fraction.
proper
What is an example of using perimeter in real life?
Answers vary.
Ex. Building a fence.
Ex. Putting a trim up around a room.
Ex. Boards around a hockey rink.
What is an example in real life of when area is measured?
Answers vary.
Ex. Measuring the square footage of a floor.
Ex. Measuring the wall surface to be painted.
Ex. Measuring the ground to lay grass sod.
If m = 6 and p = 3, what is the value of x?
3m + 2p = x
24
Give me an example of when you would measure surface area in real life.
Answers vary.
Ex. When determining how much wrapping paper you need to wrap a present.
Ex. When knowing how much stain/paint to use on a wooden crate.
Convert:
3/8 to a decimal
0.375
What is the perimeter of a rectangle that is 5 m by 7 m?
24 m
What is the area of a rhombus with one diagonal 6 m and another diagonal 3 m?
9m2
A prime number, x, can be written as,
3x -4 = 45 -16
11
What is the surface area of a rectangular prism that has faces with areas as follows:
15 m2, 10 m2, 5 m2, 15 m2, 10 m2, 5 m2
60 m2
Convert:
"thirteen fourths" to a decimal
3.25
The perimeter of a rectangle is 50m.
Its length is 15 m. What is its width?
10 m
What is the area of a triangle that has a base of 7 dm and a height of 400 mm?
14 dm2
or
140 000 mm2
I went to Starbucks and bought 6 grande lattes, and used a $20 gift card to help me pay. In the end, I only paid $6.00
Which expression tells this story?
A) 6L +20 = 6
B) 6L + 6 = 20
C) 6L - 20 = 6
D) 20 + 6L = 6
c) 6L - 20 = 6
The cost of 6 Lattes
- a $20 gift card
= $6 spent by me
What is the surface area of a rectangular prism that is 5 m wide, 3 m long, and 2 m high?
62 m2
2(5x3) + 2(3x2) + 2(5x2)
=30 + 12 + 20
Write as an improper fraction.
Four and six sevenths
34 / 7
What is the perimeter in km of a regular octagon that is 50 dam on each side?
4 km
The area of a trapezoid with one base 6 cm and another base 4 cm, is 25 cm2.
What is its Height in cm?
5 cm
The Area of Triangle is 54 cm2. Its height is 9 cm.
What would be the length of its base?
12 cm
A square based pyramid has Surface Area of 56 cm2.
The 4 triangular faces each have an area of 5 cm2. What are the side lengths of the square base?
6 cm
4 triangles x 5cm2 squared each = 20 cm2 for all 4 triangle faces
total 56cm2 - triangle faces total 20 cm2 = 36 cm2 for square base
L x L = 36 cm2
L = 6cm
What are 4 different strategies to compare and order fractions?
Answers will vary
Ex. If same numerator, compare denominator
Ex. If same denominator, compare numerator
Ex. If same gap away from whole, compare the size of part that's left.(Denominator)
Ex. Compare to HALF.
Ex. Compare to WHOLE.
Ex. Change to Decimal.
Ex. Model with the same size whole