Use the triangle area formula:

\(\text{Area}=\dfrac{\text{base}\times\text{height}}{2}\)

\(\text{Area}=\dfrac{5\times3}{2}=\dfrac{15}{2}=7.5\)

So the area is \(7.5\text{ cm}^2\).

A common mistake is to do \(5\times3=15\) and forget to divide by \(2\).

Use the triangle area formula:

\(\text{Area}=\dfrac{\text{base}\times\text{height}}{2}\)

\(\text{Area}=\dfrac{5\times2}{2}=\dfrac{10}{2}=5\)

So the area is \(5\text{ cm}^2\).

A common mistake is to do \(5\times2=10\) and forget to divide by \(2\).

Use the triangle area formula:

\(\text{Area}=\dfrac{\text{base}\times\text{height}}{2}\)

\(\text{Area}=\dfrac{5\times4}{2}=\dfrac{20}{2}=10\)

So the area is \(10\text{ cm}^2\).

A common mistake is to do \(5\times4=20\) and forget to divide by \(2\).

Use the triangle area formula:

\(\text{Area}=\dfrac{\text{base}\times\text{height}}{2}\)

\(\text{Area}=\dfrac{7\times3}{2}=\dfrac{21}{2}=10.5\)

So the area is \(10.5\text{ cm}^2\).

A common mistake is to do \(7\times3=21\) and forget to divide by \(2\).

Use the triangle area formula:

\(\text{Area}=\dfrac{\text{base}\times\text{height}}{2}\)

\(\text{Area}=\dfrac{6\times5}{2}=\dfrac{30}{2}=15\)

So the area is \(15\text{ cm}^2\).

A common mistake is to do \(6\times5=30\) and forget to divide by \(2\).