Problem #4

In the figure below, PQRS is rectangle. What is value of a + b + c ?

Solusi

Berdasarkan kesebangunan segitiga-segitiga dan teorema Phytagoras, diperoleh:

a^2 = 9 \cdot (9 + 16)

a^2 = 225

a = 15

b^2 = 9 \times 16 = 144

b = 12

c^2 = 16 \cdot (9 + 16)

c^2 = 400

c = 20

Sehingga, a + b + c = ...

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