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Gaurav Gupta from DPS International Gurgaon, Gurgaon
Subject :IMO    Class : Class 5

ABCD is a square of perimeter 56 m. Two triangular corners have been cut away as shown in figure. What is the perimeter of the remaining figure?



A 39 m
B 42 m
C 35 m
D 53 m


Answer is 47.8. All given answers are wrong. Triangles AEF and FBG are right angled triangles hence EF and FG need to be calculated using Pythagoras.

Ans 1:

Samyaraj Chowdhury from DPS Ruby Park, Kolkata, Kolkata
Class : Class 8

Ans 2:

varishtha from nps, banglore
Class : Class 5

Ans 3:

Mohammed Najl from Credence high school Dubai, Dubai
Class : Class 5
jow do you calculate the side of an isosceles triangle?

Ans 4:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is B because the side of the square is 56 m/4=14m. half of the two sides on the left side and the right side is being cut and the upper side is being cut totally and the two triangles are equivalent triangles. So the perimeter of the remaining part will be (7 m X 4)+14 m=28 m+14 m=42 m.

Ans 5:

Aarav Jain from NPS international, Chennai
Class : Class 5
the triangles are right angled triangles, so the hypotenuse is the largest side. so the answer is d. please check

Ans 6:

Dhriiti from BCM, Ludhiana
Class : Class 8

Ans 7:

girish from Millenium, Bathinda
Class : Class 8
side EF and FG will be 7*2^1/2 so correct answer is 47.89. pl justify your answer

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