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8 x 3.5 = 28 square inches

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Q: Base area of 8 in x 3 12 in box?
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What is the area of a triangle with a base of 12 inches and a height of 3 inches?

Area=18. Area= Base * height / 2 (12*3)/2


How do you find the base of a parallelogram when the area is 36ft2 and the height is 3ft?

Area = Base*Height so Base = Area/Height = 36/3 = 12 feet


Area of triangle base is 8 yd height is 3 yd?

Area = 12 sqyds


A trapezoid has a height of 3cm the first base is 5cm and the second base 3cm what is the area?

Area of trapezoid: 0.5*(5+3)*3 = 12 square cm


What is the volume of a 5 by 3 by 2 box?

30. It's the Base Area times the height.


If the total area is 18 in 2 and the height is 12 in then what is the base length?

3


What is the area of a rectangle with a base of 3 feet and a height of 4 feet?

It is: 3*4 = 12 square feet


What is the area of a triangle with a base of 3 inches and a height of 8 inches?

Area = 0.538 = 12 square inches


What is the area of a triangle with base 3 cm and height 8cm?

12 square cm


What is the base area of a box that is 3 and a half inches 13 inches in 8 inches?

The answer will depend on which of the three measures is the height. Ignore that one and multiply the other two to get the base area.


If the aea of a triangle is 18 square inches and the height is 12 inches what is the base?

The formula for the area (A) of a triangle is A = 1/2 base x altitude (or vertical height). 18 = 1/2 x base x 12 : base = 2 x 18 ÷ 12 = 3 : The base is 3 in long.


The height of a triangle is four times the length of the base find the base and height of the triangle if the base is 18 square inches?

18 square inches is probably the area of the triangle, not the length of the base. The length of the base would be measured in inches (a unit of length), not square inches (a unit of area). So area = 1 / 2 * base * height = 18 square inches (given) height = 4 * base (given) 1 / 2 * base * 4 * base = 18 square inches 2 * base * base = 18 square inches base * base = 9 square inches base = 3 inches height = 4 * base = 4 * 3 inches = 12 inches Checking our work: height is 4 times the base (12 = 4 * 3) area is 18 (1/2 * 12 * 3).