Square (regular quadrilateral):

all four sides are of equal length (equilateral), and all four angles are right angles. 

A triangle that has no equal sides and no equal angles is known as a Scalene Triangle

while 

if two sides of a triangle are of equal length, then it is called. Isosceles triangle

1. Answer see in detail...

1. First
2. Second
3. Third
4. None of these

1. Rectangle
2. Square
3. Circle
4. Rhombus

1. 120
2. 130
3. 140
4. 150

1. 1
2. 2
3. 3
4. None of these