Question

what is the area of the triangle? 45 square units 27 square units 54 square units 90 square units

Explanation:

Step1: Determine the base and height

Assume each grid is 1 unit. The base of the triangle is 9 units (count the horizontal length), and the height is 10 units (count the vertical distance from the base to the opposite vertex).

Step2: Use the triangle area formula

The formula for the area of a triangle is \(A=\frac{1}{2}\times base\times height\). Substitute base = 9 and height = 10 into the formula: \(A=\frac{1}{2}\times9\times10\).
Calculate \(\frac{1}{2}\times9\times10 = 45\).

Answer:

45 square units