Rectangle Triangles 36557A
1. **Problem Statement:** Given rectangle ABCD with E as the midpoint of AD, verify which statements are correct:
i. \(\triangle ABE \cong \triangle CDE\)
ii. Area of rectangle ABCD is twice the area of \(\triangle ABE\)
iii. Area of \(\triangle BCE = 25\) square meters
2. **Given:** ABCD is a rectangle, so opposite sides are equal and all angles are 90°.
E is midpoint of AD, so \(AE = ED\).
3. **Check statement (i):** \(\triangle ABE \cong \triangle CDE\)
- In rectangle ABCD, \(AB = CD\) and \(BE = DE\) because E is midpoint of AD.
- \(\angle ABE = \angle CDE = 90^\circ\) (since ABCD is rectangle).
- By RHS (Right angle-Hypotenuse-Side) congruence, \(\triangle ABE \cong \triangle CDE\).
4. **Check statement (ii):** Area relation
- Area of rectangle ABCD = length \(\times\) width.
- \(E\) is midpoint of \(AD\), so \(AE = \frac{AD}{2}\).
- Area of \(\triangle ABE = \frac{1}{2} \times AB \times AE = \frac{1}{2} \times AB \times \frac{AD}{2} = \frac{1}{4} AB \times AD\).
- Therefore, area of rectangle ABCD = \(AB \times AD = 4 \times \text{area of } \triangle ABE\), not twice.
- So statement (ii) is **incorrect**.
5. **Check statement (iii):** Area of \(\triangle BCE = 25\) square meters
- Given side BC = 10 (from figure description).
- Since ABCD is rectangle, \(AB = CD = 10\).
- E is midpoint of AD, so coordinates or lengths can be used to find area.
- Area of \(\triangle BCE = \frac{1}{2} \times BC \times height\).
- If height is 5, area = \(\frac{1}{2} \times 10 \times 5 = 25\).
- This matches the given area, so statement (iii) is **correct**.
6. **Conclusion:** Statements (i) and (iii) are correct, (ii) is incorrect.
**Final answer:** b. i & iii