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Find the area of a triangle whose base is $12, cm$ and height is $7, cm$ .

easy 1 mark Class 9 · Mathematics · Triangles

Answer

42, cm^{2}

The correct answer is $42, cm^{2}$ — Hence the area is $42, cm^{2}$ .

Step-by-step solution

The area of a triangle is given by $\frac{1}{2} \times base \times height$ .
Substitute the given values: $\frac{1}{2} \times 12 \times 7$ .
Multiply $12$ by $7$ to get $84$ .
Divide $84$ by $2$ to get $42$ .
Hence the area is $42, cm^{2}$ .

Common mistake: Using the formula

base \times height

instead of

\frac{1}{2} base \times height

Concept tested: Area of triangle

Published 10 October 2026 · How this solution was prepared and checked

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