面积计算器
选择一个图形，输入它的尺寸，然后按"计算"。
结果
输入数值并点击“计算”查看结果。
公式
A triangle is half of a parallelogram with the same base and height.
Average the two parallel sides, then multiply by the height.
如何使用此计算器
- Choose the shape; the inputs change to match it.
- Use the perpendicular height, not a slanted side.
例题
Triangle with base 10 and height 6
A = ½ × 10 × 6 = 30 square units.
常见问题
What units is the answer in?
Square units of whatever you entered — e.g. cm in gives cm².
Where is the circle?
Use the Circle Calculator, which also gives exact answers in terms of π.