### Home > CC1MN > Chapter 1 Unit 1 > Lesson CC1: 1.2.4 > Problem1-91

1-91.

Study the dot pattern below.

 $\begin{array}{c c c} & \bullet \\ \bullet & \; & \bullet \\ \newcommand{blank}{\ } & \bullet \end{array}\\ \array{\text{Figure 1}}$ $\begin{array}{c c c} \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \bullet & \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \end{array}\\ \array{\text{Figure 2}}$ $\begin{array}{c c c} \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \bullet & \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \end{array}\\ \array{\text{Figure 3}}$
1. Sketch the $4^{\text{th}}$ and $5^{\text{th}}$ figures.

What is the pattern of the first $3$ figures? Follow this pattern in sketching Figures $4$ and $5$

See Figures 4 and 5 below.

 $\begin{array}{c c c} \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \bullet & \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \end{array}\\ \text{Figure 4}$ $\begin{array}{c c c} \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \bullet & \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \\ \newcommand{blank}{\ } & \bullet \end{array}\\ \text{Figure 5}$
2. How many dots will the $50^{\text{th}}$ figure have?

Try finding a way to describe how you add dots to the figures.