Download Intro to Geometry and Identifying Angles

Math 9 Numeracy – Unit 7.1
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Intro to Geometry and Identifying Angles
7.1 – Intro to Geometry and Identifying Angles
Geometry is the study of ways to measure shapes made up of lines, angels and arcs.
Geometry has real-world applications whenever you try to measure an angle, perimeter,
volume or area.
Here are the basic geometric shapes you will have to know;
You will also need to know about lines.
Your turn…
Directions: Using the diagrams provided, look at the following geometric shape or figure
and write down its proper name.
Directions: Go back and color your geometric shapes. You will want to try and color similar
shapes as similar color. For example, you may want to color all three sides shapes different
shades of blue, and all shapes that have volume different shades of red.
Identifying Angles
An angle is made up of two rays that meet at a point know as a vertex.
Point A is the vertex of angle BAC. Line AB and Line AC meet at Point A. Lines are
identified by two points, as in Line AB. Angles are identified by three points with the
middle point always being the vertex as in Angle BAC.
An angle is measured in terms of a unit knows as a “degree” (o). There are 360 o in a circle.
Here are some common angles;
Your turn…
Directions: Label each angle as; straight, right, obtuse or acute.
Directions: In the space provided draw the angles listed
acute angle
straight angle
right angle
obtuse angle
Parallel Lines and Bisecting Angles