On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number?
EXAMPLE
There is a triangle
one side is 1.5
the base is 2
and the other side is 3
What do I do?
You can't ignore 0.5 of the unit.
Perimeter = 1.5 + 2 + 3 = 6.5
Same thing on area?
1.5 X 2.0 X 3.0=9000?
The area of a triangle is 1/2bh
What is the height?
If the height has a decimal, it must be used.
9.000?
To find the perimeter of a shape, you add up the lengths of all the sides. In your example, you have a triangle with side lengths of 1.5, 2, and 3. To find the perimeter, you need to add these lengths together.
Perimeter = 1.5 + 2 + 3
In this case, since one side length (1.5) has a decimal and the other two (2 and 3) do not, you can simply add them together without any multiplication or adjustment.
Perimeter = 1.5 + 2 + 3 = 6.5
So, the perimeter of the triangle would be 6.5.
Now, let's move on to finding the area of a triangle. The formula for the area of a triangle is (base * height) / 2. In your example, you mentioned the base is 2, but you didn't provide the height of the triangle.
If you have the height, you can substitute the values into the formula and calculate the area. However, if you don't have the height, you cannot find the area with the given information.
Therefore, to find the perimeter, you add up all the side lengths, and to find the area, you need the base and height of the triangle.