- Aequilateral
- Bright-angled isosceles
- Cscalene
- Dobtuse-angled
Step-by-Step Solution
The diagonal makes a right-angled triangle whose two legs (sides of the square) are equal, so it is right-angled isosceles.
Answer: B) right-angled isosceles
A square's diagonal divides it into two triangles. Each triangle is:
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