Prove that the triangle determined by the points (3, 0), (-1, 2), and (5, 4) is isosceles but not equilateral.
The two sides are equal and third one is different so it is an isosceles triangle not an equilateral triangle.
Given information:
The given points (3, 0), (-1, 2), and (5, 4).
Concept used:
- First, find the value for x on the x-axis.
- Next, find the y-value on the y-axis.
- The point should be plotted at the intersection of x and y.
- Finally, plot the point on your graph at the appropriate spot.
- Then join all the points to make a closed figure.
Calculation:
The given points A(3, 0), B(-1, 2), and C(5, 4).
Plotting the points in the graph -
Using distance formula −
A(3, 0), B(-1, 2)
B(-1, 2), C(5, 4)
A(3, 0), C(5, 4).
AB = CA =
BC =
So the two sides AB=CA are equal and third side BC is different.
Therefore ABC is an isosceles triangle not an equilateral because equilateral triangle have all sides same.
Chapter P Solutions
PRECALCULUS:GRAPH...-NASTA ED.(FLORIDA)
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