Units and Area Review

Drag and Drop

Which of the following are units of area?​ ​

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Drag these tiles and drop them in the correct blank above

m

miles cubed

square miles

cm

Definitions

Two-dimensional (2D): having length and width, but not depth; flat

Area: the flat space taken up by a two-dimensional object

Unit of Area: a way to measure area; units of area are usually squared (examples: in2, ft2, m2, square units)

Copy these definitions into the "Definitions" section of your Digital Notebook.

Open Ended

What do you notice about the areas given for each triangle-rectangle pair?

Open Ended

What do you notice about the lengths given for each triangle-rectangle pair?

Example: Calculating Area

1.Choose the correct formula.

Area of a triangle=½ bh

2.Find the values of b and h.

b=18
h=7

3.Plug b and h into the formula.

A=½ (18)(7) = 63

4.State the answer with correct units.

A=63 in

Multiple Choice

Why does b = 18?

• 1. b stands for “base,” which is the longest side of the triangle

• 1. b stands for “base,” which is the side perpendicular (at a right angle to) the height

• 1. b could be any of the side lengths; we just picked 18

Multiple Choice

Why does h = 7?

• 1. h stands for “height,” which is never one of the sides of the triangle

• 1. h stands for “height,” which is the shortest side of the triangle

• 1. h stands for “height,” which is the perpendicular distance from the base to the opposite corner

Multiple Choice

1. Could 9 or 13 be used for b?

• 1. No

• 1. Yes

• 1. Yes, but the height would be different

Multiple Select

1. Why does the answer include the units in^2? (choose all correct answers)

• 1. Because the area unit that goes with inches is square inches or in^2

• 1. Because b and h are both inches, and inches x inches will be in^2

• 1. in^2 is the wrong unit

Multiple Choice

Which formula would you need to find the area of a circle?

• $$A=l\cdot w$$

• $$A=\pi r^2$$

• $$A=\frac{1}{2}bh$$

Fill in the Blanks

Open Ended

Find the area of the circle.

Poll

What did you think of this Quizizz lesson?

• I liked it. This kind of assignment works well for me

• It was OK

• I hated it, please never do a Quizizz lesson again