PQRS is a square whose side is 20 cm. By joining opposite vertices of PQRS are get four triangles. What is the sum of the perimeters of the four triangles?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 80√2 + 80
SQ = PR = 20√2 cm
PO = OR = QO = OS = 10√2 cm
Hence,
Sum of the perimeter of four triangles = 4[20 + 20√2] = (80√2 + 80) cm