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Iteru [2.4K]
2 years ago
6

In the figure above, what is the area of triangle QRS?

Mathematics
1 answer:
Vlad [161]2 years ago
6 0

Answer:

D) 20.

Step-by-step explanation:

First find the value of x using Pythagoras theorem:

10^2 = x^2 + (2x)^2

5x^2 = 100

x^2 = 20

x = √20

  = 2√5.

So the area of triangle

= 1/2 * base * height

= 1/2 * 2x * x

=  x^2

=  (2√5)^2

=  20.

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