\( \overline{\mathrm{AB}} \) is a diameter in a circle M , if \( \mathrm{B}(8,11) \) and \( \mathrm{M}(5,7) \) [1] the coordinates of \( \mathrm{A} \rightarrow \) [2] The perimeter of the circle, where \( \pi=3.14 \) 《A(2.3), 314

c) \( \left(\frac{z+1}{z-1}\right)^{n}+\left(\frac{z-1}{z+1}\right)^{n}=1 \quad\left(n \in \mathbb{N}^{*}\right) \)

3. The Northwest Ordinance: 4. Occupy: 5. Recession: 6. Duty:

\( \sqrt {78=7==\times 5}\infty {}_{|5|}P_{} \)

Find the greatest common factors (GCF) of the following numbers. 1. Using Venn diagram method a. 12,18 b. 24,64 c. \( 45,63,99 \) 2. Using prime factorization method a. 24,54 b. 108,104 c. \( 180,270,1,080 \)

\begin{tabular}{l} Exercise 2.5 \\ \( \begin{array}{lll}\text { 1. Express each of the following numbers as prime factorization form. } \\ \begin{array}{lll}\text { a. } 21 & \text { b. } 70 & \text { c. } 105\end{array} \\ \begin{array}{lll}\text { d. } 252 & \text { e. } 360 & \text { f. } 1,848\end{array} \\ \text { 2. } 180 \text { can be written as } 2^{a} \times 3^{b} \times 5^{c} \text {. Then, find the value of } a, b \text { and } c \text {. } \\ \text { 3. Find the four prime numbers whose product is } 462 .\end{array} \) \\ \hline\end{tabular}