Area of a triangle

Find the area of a triangle with a base of 7 mm and a height of 10 mm?

Correct answer:

A =  35 mm²

Step-by-step explanation:

$$\begin{gathered} a=7\text{ mm } \\ h=10\text{ mm } \\ A={\displaystyle \frac{a\cdot h}{2}}={\displaystyle \frac{7\cdot 10}{2}}=35{\text{mm}}^2 \end{gathered}$$

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