Question

Luella drew the triangle shown on a coordinate grid. To find the triangle's area, she multiplies 1/2 by 2 and then multiplies the result by another number. What is the result by another number. What is the number Luella can use to complete the calculations? Luella can multiply 1/2 by 2 by _ to find the triangle's area.

Answer 1

Area = (1/2)·base·height. She already multiplied (1/2)·2 = 1, so she just needs to multiply by the height (the vertical distance from the base to the opposite vertex). Counting the grid squares gives height = 3.

So she multiplies by 3, and the triangle's area is 1·3 = 3 square units.