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Geometry and Trigonometry / Area and volume Difficulty: Easy

A triangle has a base length of $40$ centimeters and a height of $90$ centimeters. What is the area, in square centimeters, of the triangle?

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Explanation

The correct answer is $1,800$ . The area, $A$ , of a triangle can be found using the formula $A = \frac{1}{2} b h$ , where $b$ is the base length of the triangle and $h$ is the height of the triangle. It’s given that the triangle has a base length of $40$ centimeters and a height of $90$ centimeters. Substituting $40$ for $b$ and $90$ for $h$ in the formula $A = \frac{1}{2} b h$ yields $upper A equals one half left parenthesis 40 right parenthesis left parenthesis 90 right parenthesis$ , or $upper A equals 1,800$ . Therefore, the area, in square centimeters, of the triangle is $1,800$ .