Applications of Linear Equations
Example 107.
The second angle of a triangle is double the first. The third angle is less than the first. Find the three angles.
Another geometry problem involves perimeter or the distance around an object. For example, consider a rectangle has a length of 8 and a width of 3. There are two lengths and two widths in a rectangle (opposite sides) so we add . As there are two lengths and two widths in a rectangle an alternative to find the perimeter of a rectangle is to use the formula . So for the rectangle of length 8 and width 3 the formula would give, . With problems that we will consider here the formula will be used.