To find the area of a triangle, we use the formula:
Area = $\frac{1}{2} \times \text{base} \times \text{height}$
This means you multiply the base by the height, and then divide that number by 2. Let's solve each problem step-by-step.
Problem 1:
* Base = $18\text{ cm}$
* Height = $12\text{ cm}$
* Calculation: $18 \times 12 = 216$. Then, $216 / 2 = 108$.
* Area =
$108\text{ cm}^2$
Problem 2:
* Base = $33\text{ in}$
* Height = $22\text{ in}$
* Calculation: $33 \times 22 = 726$. Then, $726 / 2 = 363$.
* Area =
$363\text{ in}^2$
Problem 3:
* Base = $6\text{ m}$
* Height = $9\text{ m}$
* Calculation: $6 \times 9 = 54$. Then, $54 / 2 = 27$.
* Area =
$27\text{ m}^2$
Problem 4:
* Base = $11\text{ cm}$
* Height = $13\text{ cm}$
* Calculation: $11 \times 13 = 143$. Then, $143 / 2 = 71.5$.
* Area =
$71.5\text{ cm}^2$
Problem 5:
* Base = $7\text{ yd}$
* Height = $5\text{ yd}$
* Calculation: $7 \times 5 = 35$. Then, $35 / 2 = 17.5$.
* Area =
$17.5\text{ yd}^2$
Problem 6:
* Base = $4\text{ mm}$
* Height = $9\text{ mm}$
* Calculation: $4 \times 9 = 36$. Then, $36 / 2 = 18$.
* Area =
$18\text{ mm}^2$
Problem 7:
* Base = $44\text{ mm}$
* Height = $28\text{ mm}$
* Calculation: $44 \times 28 = 1232$. Then, $1232 / 2 = 616$.
* Area =
$616\text{ mm}^2$
Problem 8:
* Base = $15\text{ in}$
* Height = $8\text{ in}$
* Calculation: $15 \times 8 = 120$. Then, $120 / 2 = 60$.
* Area =
$60\text{ in}^2$
Final Answer:
1. $108\text{ cm}^2$
2. $363\text{ in}^2$
3. $27\text{ m}^2$
4. $71.5\text{ cm}^2$
5. $17.5\text{ yd}^2$
6. $18\text{ mm}^2$
7. $616\text{ mm}^2$
8. $60\text{ in}^2$
Parent Tip: Review the logic above to help your child master the concept of triangles area worksheet.
