Question

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Answer 1

Answer:

Step-by-step explanation:

Property of square : Diagonals in the square are angle bisectors.

1. Since we know, angle of square is 90 degrees

Hence, <OAB = <OBA = 45 degrees

As per the property of isosceles triangle, opposite angles of equal sides of a triangle is equal; converse is also true.

Hence triangle OAB is an isosceles triangle.

2. <XOD = 180 - <DXO - <XDO = 180 - 78 - 45 = 57 degrees

3. <XOC = 180 - <XCO - <CXO = 180 - 45 - (180-78) = 180 - 45 - 102 = 42 degrees

Answer 2

Answer:

In triangle OAB

OA=OB (diagonals bisects each other)

two of its side is equal so,it is an isosceles triangle

angle COD=90°(diagonals of square)

angle XOD=½angle COD

XOD=½×90°

=45°

similarly, angle XOC=45°

HOPE, this helps you plss mark it as brainlist.