Free. Exclusive. Just for you.
Four unique services that make learning easier, faster, and smarter - only on our website.

Find the perimeter and area of the given geometric shapes.

Worksheet with six geometric shapes (rectangles and triangles) showing side lengths in centimeters, asking to find perimeter and area.

Worksheet with six geometric shapes (rectangles and triangles) showing side lengths in centimeters, asking to find perimeter and area.

JPG 992×1403 91.6 KB Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #696352
Show Answer Key & Explanations Step-by-step solution for: Grade Perimeter Area Worksheet Kidschoolz, 56% OFF
To solve the problem, we need to calculate the perimeter and area for each of the given shapes. Let's go through each shape step by step.

---

Shape 1: Rectangle with a cut-out


#### Dimensions:
- Outer rectangle: \(76 \, \text{cm} \times 38 \, \text{cm}\)
- Inner rectangle (cut-out): \(24 \, \text{cm} \times 14 \, \text{cm}\)

#### Perimeter:
The perimeter of the outer rectangle is:
\[
P_{\text{outer}} = 2 \times (76 + 38) = 2 \times 114 = 228 \, \text{cm}
\]
The inner rectangle does not affect the perimeter since it is a cut-out. Therefore, the perimeter remains:
\[
\boxed{228 \, \text{cm}}
\]

#### Area:
The area of the outer rectangle is:
\[
A_{\text{outer}} = 76 \times 38 = 2888 \, \text{cm}^2
\]
The area of the inner rectangle is:
\[
A_{\text{inner}} = 24 \times 14 = 336 \, \text{cm}^2
\]
The area of the shape is the area of the outer rectangle minus the area of the inner rectangle:
\[
A = 2888 - 336 = 2552 \, \text{cm}^2
\]
\[
\boxed{2552 \, \text{cm}^2}
\]

---

Shape 2: Triangle


#### Dimensions:
- Base: \(15 \, \text{cm}\)
- Height: \(58 \, \text{cm}\)
- Hypotenuse: \(29 \, \text{cm}\)

#### Perimeter:
The perimeter is the sum of all sides:
\[
P = 15 + 58 + 29 = 102 \, \text{cm}
\]
\[
\boxed{102 \, \text{cm}}
\]

#### Area:
The area of a triangle is given by:
\[
A = \frac{1}{2} \times \text{base} \times \text{height} = \frac{1}{2} \times 15 \times 58 = \frac{1}{2} \times 870 = 435 \, \text{cm}^2
\]
\[
\boxed{435 \, \text{cm}^2}
\]

---

Shape 3: Triangle


#### Dimensions:
- Sides: \(52 \, \text{cm}\), \(58 \, \text{cm}\), \(29 \, \text{cm}\)

#### Perimeter:
The perimeter is the sum of all sides:
\[
P = 52 + 58 + 29 = 139 \, \text{cm}
\]
\[
\boxed{139 \, \text{cm}}
\]

#### Area:
We use Heron's formula to find the area. First, calculate the semi-perimeter \(s\):
\[
s = \frac{52 + 58 + 29}{2} = \frac{139}{2} = 69.5 \, \text{cm}
\]
Next, use Heron's formula:
\[
A = \sqrt{s(s-a)(s-b)(s-c)}
\]
where \(a = 52\), \(b = 58\), and \(c = 29\):
\[
A = \sqrt{69.5 \times (69.5 - 52) \times (69.5 - 58) \times (69.5 - 29)}
\]
\[
A = \sqrt{69.5 \times 17.5 \times 11.5 \times 40.5}
\]
Calculate step-by-step:
\[
69.5 \times 17.5 = 1226.25
\]
\[
11.5 \times 40.5 = 465.75
\]
\[
1226.25 \times 465.75 = 572,109.375
\]
\[
A = \sqrt{572,109.375} \approx 756.38 \, \text{cm}^2
\]
\[
\boxed{756.38 \, \text{cm}^2}
\]

---

Shape 4: Rectangle


#### Dimensions:
- Length: \(78 \, \text{cm}\)
- Width: \(68 \, \text{cm}\)

#### Perimeter:
The perimeter of a rectangle is:
\[
P = 2 \times (\text{length} + \text{width}) = 2 \times (78 + 68) = 2 \times 146 = 292 \, \text{cm}
\]
\[
\boxed{292 \, \text{cm}}
\]

#### Area:
The area of a rectangle is:
\[
A = \text{length} \times \text{width} = 78 \times 68 = 5304 \, \text{cm}^2
\]
\[
\boxed{5304 \, \text{cm}^2}
\]

---

Shape 5: Isosceles Triangle


#### Dimensions:
- Base: \(31 \, \text{cm}\)
- Equal sides: \(31 \, \text{cm}\)
- Height: \(42 \, \text{cm}\)

#### Perimeter:
The perimeter is the sum of all sides:
\[
P = 31 + 31 + 31 = 93 \, \text{cm}
\]
\[
\boxed{93 \, \text{cm}}
\]

#### Area:
The area of a triangle is:
\[
A = \frac{1}{2} \times \text{base} \times \text{height} = \frac{1}{2} \times 31 \times 42 = \frac{1}{2} \times 1302 = 651 \, \text{cm}^2
\]
\[
\boxed{651 \, \text{cm}^2}
\]

---

Shape 6: Right Triangle


#### Dimensions:
- Base: \(25 \, \text{cm}\)
- Height: \(36 \, \text{cm}\)
- Hypotenuse: \(40 \, \text{cm}\)

#### Perimeter:
The perimeter is the sum of all sides:
\[
P = 25 + 36 + 40 = 101 \, \text{cm}
\]
\[
\boxed{101 \, \text{cm}}
\]

#### Area:
The area of a triangle is:
\[
A = \frac{1}{2} \times \text{base} \times \text{height} = \frac{1}{2} \times 25 \times 36 = \frac{1}{2} \times 900 = 450 \, \text{cm}^2
\]
\[
\boxed{450 \, \text{cm}^2}
\]

---

Final Answers:


1. Rectangle with cut-out:
- Perimeter: \(228 \, \text{cm}\)
- Area: \(2552 \, \text{cm}^2\)

2. Triangle:
- Perimeter: \(102 \, \text{cm}\)
- Area: \(435 \, \text{cm}^2\)

3. Triangle:
- Perimeter: \(139 \, \text{cm}\)
- Area: \(756.38 \, \text{cm}^2\)

4. Rectangle:
- Perimeter: \(292 \, \text{cm}\)
- Area: \(5304 \, \text{cm}^2\)

5. Isosceles Triangle:
- Perimeter: \(93 \, \text{cm}\)
- Area: \(651 \, \text{cm}^2\)

6. Right Triangle:
- Perimeter: \(101 \, \text{cm}\)
- Area: \(450 \, \text{cm}^2\)

\[
\boxed{
\begin{array}{ll}
\text{1. Perimeter: } 228 \, \text{cm}, & \text{Area: } 2552 \, \text{cm}^2 \\
\text{2. Perimeter: } 102 \, \text{cm}, & \text{Area: } 435 \, \text{cm}^2 \\
\text{3. Perimeter: } 139 \, \text{cm}, & \text{Area: } 756.38 \, \text{cm}^2 \\
\text{4. Perimeter: } 292 \, \text{cm}, & \text{Area: } 5304 \, \text{cm}^2 \\
\text{5. Perimeter: } 93 \, \text{cm}, & \text{Area: } 651 \, \text{cm}^2 \\
\text{6. Perimeter: } 101 \, \text{cm}, & \text{Area: } 450 \, \text{cm}^2 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of 5th grade area math worksheet.
Print Download

How to use

Click Print to open a print-ready version directly in your browser, or use Download to save the file to your device. The ⭐ Answer button generates an AI answer key instantly - useful for teachers who need a quick reference. Need a different version? Our AI Worksheet Generator lets you create a custom worksheet on any topic in seconds.

(view all 5th grade area math worksheet)

FREE 5th Grade Math Worksheets
Area and Perimeter Worksheets | Grade1to6.com
Grade 5 Math Worksheets | Free Worksheets | Printables
Area of a Rectangle Worksheets - Math Monks
Multiplication Worksheets for 5th Graders Online - SplashLearn
5th Grade Math Worksheets Free and Printable - Appletastic Learning
Grade 5 Math Worksheets: Volume & surface area of rectangular ...
Grade 5 Worksheets: Area of triangles, parallelograms, trapezoids ...
Grade 5 Area and Perimeter Worksheets | Free Math Worksheets
Grade 5 Area & Perimeter Worksheets | Free Worksheets