*S2. Two quadrilaterals, IJKL and MNOP, are congruent. Identify the congruent angles of the quadrilaterals.

5. \( A B C \) гурвалжны \( A B=B C=8 \) см ба талбай нь \( s=16 \mathrm{~cm}^{2} \) бол өнцөг \( A B C= \) ?

8. Uma regiāo triangular tem área igual a \( 16 \mathrm{~cm}^{2} \). Sabendo que a base é 4 cm , determine a altura dessa regiăo triangular.

Find the area of the sector of a at the centre is \( 140^{\circ} \). (Take \( \pi= \) Solution Area A of a sector is given by; \( \begin{aligned} \text { A }=\frac{\theta}{360} \times \pi r^{2}\end{aligned} \) \( \begin{aligned} \therefore \text { Area } & =\frac{140}{360} \times \frac{22}{7} \times 3^{2} \\ & =11 \mathrm{~cm}^{2}\end{aligned} \)

3 треугольнике \( A B C \) к стороне \( A B=9 \) см опущена высота, длина которой составила 8 см Найди площадь этого треугольника и дай ответ з квадратных сантиметрах.

5. A tree is broken at a height of 5 m from the ground and its top touches the ground at a distance of 12 m from the base of the tree. Find the original height of the tree.