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Standard 8.G.A.5- Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.

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We will be able to find angles in triangles and know what kind of angles exist

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Did you know that Native Americans use their body to measure the degree of trees? Yes, they did! Native Americans had a very interesting and unusual way of seeing how high a tree was. They would bend over and look through their legs!They would walk far enough from the tree to a find a place where they were just able to see the top of the tree (from their upside down position). The distance from this place to the base of the tree was approximately the height of the tree. It actually worked for them.

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In geometry and trigonometry, an angle (or plane angle) is the figure formed by two rays sharing a common endpoint. The endpoint is called the vertex of the angle.

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The vertex : is the common point at which the two lines or rays are joined. Point B is the figure above is the vertex of the angle.
The legs: (sides) of an angle are the two lines that make it up.
Interior: the space in the 'jaws' of the angle extending out to infinity.

Exterior: All the space on the plane that is not the interior.

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An easy way to measure an angle is using a protractor.

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For this activity you will have to use your protractor to measure the angles. After measuring the angles define which type of angle it is

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You will be able to know how to measure angles. Students will be need this knowledge for further grades and this lesson is right for them to be able to learn in the next grades

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“Types Of Angles (Examples, Solutions, Worksheets, Videos).” Www.onlinemathlearning.com, www.onlinemathlearning.com/types-of-angles.html.
"Angle - Math Word Definition - Math Open Reference". Mathopenref.Com, 2018, https://www.mathopenref.com/angle.html.
"Angle (Mathematics) - New World Encyclopedia". Newworldencyclopedia.Org, 2018,http://www.newworldencyclopedia.org/entry/Angle_(mathematics)#History.

"History Of Measurement". Nrich.Maths.Org, 2018, https://nrich.maths.org/2434