Session TWO.

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Find Angle Measures in Polygons

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Presentation transcript:

Session TWO

Let’s look at the homework!

Diagonals of polygons Q: What is a diagonal? A: Diagonals are line segments that connect one corner (vertex) to another, but not the sides. A pentagon (5-sides) has 5 diagonals.

Number of diagonals from each corner Do you see a pattern? Number of corners Number of diagonals from each corner Pattern 5 2 6 3 7 4 8 9 10

Number of diagonals from each corner Do you see a pattern? Number of corners Number of diagonals from each corner Pattern 5 2 Subtract 3 6 3 7 4 8 9 10

Number of diagonals from each corner Number of corners Number of diagonals from each corner Total number of lines 5 2 5 x 2 = 10 6 3 6 x 3 = 18 7 4 7 x 4 = 28 8 8 x 5 = 40 9 9 x 6 = 54 10 10 x 7 = 70

Number of diagonals from each corner Number of corners Number of diagonals from each corner Total number of lines Number of diagonals 5 2 5 x 2 = 10 10/2 = 5 6 3 6 x 3 = 18 18/2 = 9 7 4 7 x 4 = 28 28/2 = 14 8 8 x 5 = 40 40/2 = 20 9 9 x 6 = 54 54/2 = 27 10 10 x 7 = 70 70/2 = 35

What were your steps to find an expression? reflections What were your steps to find an expression?

Homework Try another one!

Thank you so much See you all next week!