Calculate the area of the equilateral triangle using the formula for area of a regular polygon, and compare it to Bianca’s answer. The apothem, rounded to the nearest tenth, is units. The perimeter of the equilateral triangle is units. Therefore, the area of the equilateral triangle is , or approximately 43.5 units2. The calculated areas are .
Answer
Selection 1:
2.9
Selection 2:
30
Selection 3:
1/2(2.9)(30)
Selection 4:
the same, despite using different formulas

Question

Calculate the area of the equilateral triangle using the formula for area of a regular polygon, and compare it to Bianca’s answer. The apothem, rounded to the nearest tenth, is units. The perimeter of the equilateral triangle is units. Therefore, the area of the equilateral triangle is , or approximately 43.5 units2. The calculated areas are .

Answer

Selection 1:

2.9

Selection 2:

30

Selection 3:

1/2(2.9)(30)

Selection 4:

the same, despite using different formulas

Revolt · Accepted Answer

2.9; Selection 1: 2.9; Selection 2: 30; Selection 3: 1/2(2.9)(30); Selection 4: the same, despite using different formulas