Ontario Mathematics Proficiency Practice Test

Question: 1 / 400

What is the area of a triangle with a base of 10 cm and a height of 5 cm?

10 cm²

20 cm²

25 cm²

To find the area of a triangle, you can use the formula:

\[

\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}

\]

In this case, the base is given as 10 cm and the height is given as 5 cm. Plugging these values into the formula:

\[

\text{Area} = \frac{1}{2} \times 10 \, \text{cm} \times 5 \, \text{cm}

\]

\[

\text{Area} = \frac{1}{2} \times 50 \, \text{cm}^2

\]

\[

\text{Area} = 25 \, \text{cm}^2

\]

Therefore, the area of the triangle is 25 cm². This is why the correct answer reflects that. The calculation demonstrates that with the specified measurements of the base and height, the resulting area indeed amounts to 25 cm².

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30 cm²

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