Question

plz. give all the answer

Answer 1

First one is true... Bcoz if u convert the square in the form of 2 triangles dividing it by a diagonal... U can prove that the triangles r isoceles since all sides of square r equal.... And since base angles r equal of the triangle when u add the angles it will sum upto 90...in a triangle by angle sum property u can say tht all angles sum upto 180.... Therefore when u substitute the value u can prove that one of the corner is 90...similarly u can prove the rest