Question
PSLE
Ivan cut out three identical right-angled triangles. He joined them to form the figure QRST shown. ST = 20 cm and TQ = 26 cm. The perimeter of the figure is 80 cm. Find the area of the figure QRST.
2 m

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PSLE
Ivan cut out three identical right-angled triangles. He joined them to form the figure QRST shown. ST = 20 cm and TQ = 26 cm. The perimeter of the figure is 80 cm. Find the area of the figure QRST.