Answer:
1
Step-by-step explanation:
it is 6/6
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You can focus on the two sub-triangles ABC and ACD
We know that they are both right triangles, because we're given that AC and BD are perpendicular.
The sides AB and AD are the hypothenuses of these triangles, so we know their length through the pythagorean theorem:


But since we're given
, the expressions for AD and AB are actually the same expression. This proves that AD=AB, and thus that the triangle is isosceles.
Answer:

Step-by-step explanation:
To solve this problem use the formula "<u><em>Difference of squares</em></u>":

In this problem we have the following equation

This we can write it in the following way

Then if a = x and b = 8 then:

Then the product of both factors is equal to zero when:

Or
