In an obtuse triangle two of these will exist outside of the

triangle and one inside.

Supplementary Angles sharing a common ray.

The ……………… is equidistant from the vertices of a triangle

180( 2)n

A D

CB

AB CD

AC BD

Use three of these to construct the centroid.

This point is equidistant from all sides of a triangle

( 1)

2

n n

The Centroid will divide each median of a triangle in this way.

The three altitudes meet here.

A

B

To construct this you need to

1.Put your compass on one end of a line and open your compass up past the midpoint of a line and draw a large arc.

2.Without altering your compass width do the same from the other end of the line.

3.Use a straightedge to join the two points where the arcs meet

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10 plants are placed on a shelf and given different amounts of nutrients. Their height is measured each week. The one that had the least nutrients was the smallest while the one that had the most nutrients was tallest. Therefore the more nutrients you ad the taller the plant will grow.

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A polygon where each internal angle is equal to 120.

CB

AD

Polygon ABCD is a Square. What is the shaded shape?

CA

D

B

Polygon ACBD is a Square. What is the rest of the picture?

The end area will be the same when you slice this 3D object in a direction parallel to the base.

In a Rhombus these lines will bisect each of the vertex angles.

All things made of wood float. A duck floats so therefore a duck is made of wood.

The place where three medians of a triangle meet.