PDF chapter test TRY NOW

1. The scalene triangle has 40 \ cm as its perimeter and whose two sides are 13 \ cm and 15 \ cm, find the third side.
 
Answer:
 
The third side =  cm
 
2.closed shape has 20 equal sides and one of its sides is 3 \ cm. Find its perimeter.
 
Answer:
 
Perimeter = cm