Find the value of angle "A" and angle "B"
2 answers:
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If the perimeter is 9 inches, each side is 3 inches.
The height of an equilateral triangle splits the triangle in two right sub-triangles: for example, consider a triangle ABC and the height AH starting from A, perpendicular to BC.
The triangle AHC is a right triangle, whose legs are AH and HC, and whose hypotenuse is AC.
AH is half the side, and AC is a side. So, we can use the Pythagorean theorem to find the height:
So, the area is
This is simple as all you have to learn is what slope intercept form is and how it works. In SIF, the number paired with the x is the slope, which should always be put over 1 if it is not already put over another number. The slope is the "rise over the run" which means that it is a proportion. For every 4 that you go up in this case, you should be moving over 1 on the x axis. The other number (-5) is the y-intercept, which means that the line you draw at the slope should go through that number.
In the attached image, the y-intercept (-5) is highlighted and the blue dots shows that the line goes up 4 and over 1 (slope) between each point.
In the attached image, the y-intercept (-5) is highlighted and the blue dots shows that the line goes up 4 and over 1 (slope) between each point.