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Haunted Dimensions

A spooky Halloween-themed math lesson where students learn to identify length and width and substitute them into standard formulas to calculate the perimeter and area of squares and rectangles. Includes an instructional slide deck and a guided student practice worksheet.

RKRachel Knight

Haunted Dimensions

A spooky Halloween-themed math lesson where students learn to identify length and width and substitute them into standard formulas to calculate the perimeter and area of squares and rectangles. Includes an instructional slide deck and a guided student practice worksheet.

RKRachel Knight

👻 Area: Paint to Coat Door Surface

Formula: \(A = l \times w\)

Plug In: \(A = \)\( \times \)

Final \(A\): _____ m\(^2\)

🎃 Turn page for independent practice challenges! 👻 Page 1 of 2

👻 MATH!

SPOOKY! 👻

👻 🎃

🎃 👻

🧙‍♀️

Spooky Shapes: Independent Quest

Grade 4 🎃

Use \(P = (2 \times l) + (2 \times w)\) and \(A = l \times w\). Don't forget units!

Name: ___________________________

🕸️ Part 2: Independent Practice — Shapes with Lengths & Widths 👻 Linear (\(\text{units}\)) vs. Square (\(\text{units}^2\))!

4 🕷️ Spiderweb Cage

\(l = 10\text{ in}\) 🕸️ \(w = 4\text{ in}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times l) + (2 \times w)\)

Plug In: ____________

\(P = \) _____ in

👻 Area (\(A\)):

\(A = l \times w\)

Plug In: ____________

\(A = \) ___ in\(^2\)

5 🧪 Potion Floor Tile

\(l = 7\text{ yd}\) 🧪 \(w = 7\text{ yd}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times l) + (2 \times w)\)

Plug In: ____________

\(P = \) _____ yd

👻 Area (\(A\)):

\(A = l \times w\)

Plug In: ____________

\(A = \) ___ yd\(^2\)

6 🩹 Mummy's Crypt

\(l = 12\text{ m}\) 🩹 \(w = 5\text{ m}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times l) + (2 \times w)\)

Plug In: ____________

\(P = \) _____ m

👻 Area (\(A\)):

\(A = l \times w\)

Plug In: ____________

\(A = \) ___ m\(^2\)

🦇 Part 3: Halloween Word Problems (Decide: Perimeter or Area?) 🎃 Border = Perimeter | Floor/Cover = Area 👻

7

The Spooky Corn Maze Fence: Farmer Jack hangs glowing string lights all the way around the outer boundary of his rectangular corn maze (\(l = 15\text{ m}, w = 8\text{ m}\)).

🎃

Measurement needed:

○ Perimeter (Outer Boundary)

○ Area (Inside Space)

Formula & Plug In:

\(P = (2 \times l) + (2 \times w)\)

\(P = (2 \times \_\_) + (2 \times \_\_)\)

Total string lights:

Answer: ___________

8

Frankenstein's Ballroom Carpet: Count Dracula installs purple carpet to completely cover the flat floor inside his square ballroom (\(l = 9\text{ ft}, w = 9\text{ ft}\)).

👻

Measurement needed:

○ Perimeter (Outer Boundary)

○ Area (Inside Space)

Formula & Plug In:

\(A = l \times w\)

\(A = \_\_\_ \times \_\_\_\)

Total carpet needed:

Answer: ___________

🧙‍♂️ Spooky Bonus Mystery: The Witch's Secret Square! 🎃👻 Star Challenge

A square graveyard has a Perimeter of \(28\text{ meters}\). Since all 4 sides are equal: length = width. Find \(l\) & \(w\), then find Area!

Length & Width (\(28 \div 4\)): \(l = w = \) _____ m

Area (\(A = l \times w\)): \(A = \) _____ m\(^2\)

🎃 Formulas: \(P = (2 \times l) + (2 \times w)\) & \(A = l \times w\) 👻 Page 2 of 2

🎃 Teacher Guide • Page 1 Subtotal: 12 Points 👻 Answer Key • Page 1 of 2

👻 KEY!

ANSWERS! 👻

👻 🎃

🎃 👻

🧙‍♀️

Spooky Shapes | Solutions: Parts 2 & 3

Grade 4 Math 🎃

Independent Practice & Word Problem Scoring Key

Answer Key Total: 25 Points

🕸️ Part 2: Independent Practice Solutions 👻 Check substitution steps and units

4 🕷️ Spiderweb

\(l = 10\text{ in}\) 🕸️ \(w = 4\text{ in}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times 10) + (2 \times 4)\)

\(P = 20 + 8\)

\(P = \mathbf{28\text{ in}}\)

👻 Area (\(A\)):

\(A = 10 \times 4\)

\(A = 40\)

\(A = \mathbf{40\text{ in}^2}\)

5 🧪 Potion Tile

\(l = 7\text{ yd}\) 🧪 \(w = 7\text{ yd}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times 7) + (2 \times 7)\)

\(P = 14 + 14\)

\(P = \mathbf{28\text{ yd}}\)

👻 Area (\(A\)):

\(A = 7 \times 7\)

\(A = 49\)

\(A = \mathbf{49\text{ yd}^2}\)

6 🩹 Mummy Crypt

\(l = 12\text{ m}\) 🩹 \(w = 5\text{ m}\)

🎃 Perimeter (\(P\)):

\(P = (2 \times 12) + (2 \times 5)\)

\(P = 24 + 10\)

\(P = \mathbf{34\text{ m}}\)

👻 Area (\(A\)):

\(A = 12 \times 5\)

\(A = 60\)

\(A = \mathbf{60\text{ m}^2}\)

🦇 Part 3: Halloween Word Problem Solutions Scoring: 1 pt selection, 1 pt work, 1 pt answer

7

The Spooky Corn Maze Fence: Boundary string lights for \(l = 15\text{ m}, w = 8\text{ m}\).

🎃

Measurement needed:

☑ Perimeter (Outer Boundary)

☐ Area (Inside Space)

Formula & Plug In:

\(P = (2 \times l) + (2 \times w)\)

\(P = (2 \times 15) + (2 \times 8) = 30 + 16\)

Total string lights:

46 meters

8

Frankenstein's Ballroom Carpet: Floor covering for square room with \(l = 9\text{ ft}, w = 9\text{ ft}\).

👻

Measurement needed:

☐ Perimeter (Outer Boundary)

☑ Area (Inside Space)

Formula & Plug In:

\(A = l \times w\)

\(A = 9 \times 9\)

Total carpet needed:

81 sq ft (\(81\text{ ft}^2\))

🧙‍♂️ Spooky Bonus Mystery Solution: 🎃👻 +2 Bonus Pts

Square Perimeter = \(28\text{ m}\). All 4 sides equal: \(l = w = 28 \div 4 = 7\text{ m}\).

Length & Width (\(28 \div 4\)): \(l = w = \mathbf{7\text{ m}}\)

Area (\(7 \times 7\)): \(A = \mathbf{49\text{ m}^2}\)

🎃 Teacher Guide • Page 2 Subtotal: 13 Points (+2 Bonus) • Total: 25 Points 👻 Answer Key • Page 2 of 2

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