The area of the given triangle is 84 cm².
The area of any two-dimensional figure is the space occupied within its boundary.
The area of a triangle is calculated using the formula, A = (1/2)*b*h, where A is its area, b is the length of its base, and h is the length of its height.
In the question, we are asked to find the area of the given triangle.
The length of the base of the given triangle, b = 21 cm.
The length of the height of the given triangle, h = 8 cm.
We can calculate the area of the given triangle, using the formula, A = (1/2)*b*h, where A is its area, b is the length of its base, and h is the length of its height.
A = (1/2)*(21)*(8) cm²,
or, A = 84 cm².
Thus, the area of the given triangle is 84 cm².
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