**If the diagonals of a square ABCD intersect each other at O, then ∆OAB is**

**(a) an equilateral triangle**

**(b) a right angled but not an isosceles triangle**

**(c) an isosceles but not right angled triangle**

**(d) an isosceles right angled triangle**

**Solution:**

**More Solutions:**

- Show that DAC=BCA
- Prove that the quadrilateral
- Find the size of each lettered angle in the Following Figures.
- Lettered angle in the following figures :
- If ∠ABC = 56°, find
- Find the lengths of its diagonals.
- Prove that ∠AEB is a right angle.
- Prove that the line segment
- Prove that the diagonals of a parallelogram.
- AD is median of ∆ABC and P.