Area of Non-right Triangles Quick Check
3 of 53 of 5 Items
Question
Use the image to answer the question.
An illustration shows a 10 by 10 grid. A non-right triangle is enclosed within the grid. The first vertex is at the top of row 1 and the right of column 3. The second vertex is at the top of row 7 and the left of column 1. The third vertex is at the top of row 1 and the right of column 9.
What is the area of the non-right triangle? The base and height are found by counting the squares.
(1 point)
Responses
18 square units
18 square units
54 square units
54 square units
27 square units
27 square units
45 square units
The correct answer is 27 square units.
To calculate the area of the non-right triangle, you need to determine the base and height by counting the squares within the grid.
The base is 9 units (from column 1 to column 9) and the height is 3 units (from row 1 to row 7).
Area = 1/2 * base * height
Area = 1/2 * 9 * 3
Area = 27 square units