The length of a rectangle has increased in the ration \( 3: 2 \) and the width reduced in the ratio \( 4: 5 . \mathrm{If} \) the original length and width were 18 cm and 15 cm respectively. Find the ratio of change in (3marks)

foto Real 10. El lado de menor longitud de un triangulo \( A B C \) mide 4 cm . Si el triángulo \( A B C \) es semejante a cn triangulo cuyus lados miden \( 8 \mathrm{~cm}, 12 \mathrm{~cm} \) y 16 cm . ¿ cuál es el perimetro, en centimetrus edel iriángulo A B C?

Exploration An object has a volume of 36 cubic inches. A box has side lengths 1 foot by 3 inches by 4 inches. a. What is the smallest number of these objects that can fit in the box? Explain your reasoning.

If the height of a cylinder is doubled while keeping the radius constant, how does that affect its volume?

Qual é a fórmula para calcular a área de um círculo?

3. Construye angulos con las siguientes medidas, Luego, clasificalos según sus medidas. \( \begin{array}{lllll}\text { a. } 25^{\circ} & \text { b. } 85^{\circ} & \text { c. } 68^{\circ} & \text { d. } 150^{\circ} & \text { e. } 100^{\circ}\end{array} \)