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No. Base times half the altitude gives the area.
462 base 8 - 177 base 8 = 263 base 8 , (that's 179 in base 10) I used the octal feature on the windows calculator.
Base area is Base*Height.Base is the bottom and top part
it has 5faces and 8edges,5vertices and 4 corner
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).