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The measures of two angles in a triangle are shown in the diagram. Which equation can be used to find the value of x?
Explanatory (or independent) variables are variables such that changes in their value are thought to cause changes in the "dependent" variables.
It is essentially a list of equations that have common unknown variables in all of them. For example, a+b-c=3 4a+b+c=1 a-2b-7c=-2 would be a system of equations. If there are the same number of equations and variables you can usually, but not always, find the solutions. Since there are 3 equations and 3 variables (a, b, and c) in this example one can usually find the value of those three variables.
To find the area of a triangle, you have to multiply the base of the triangle and the height of the triangle, then divide the product of those numbers by two.
A = 1/2bh then you use Pythagoras theorem to find the length of the other 2 sides, using the known value for the height and 1/2 of the bases value.