Review: Classifying Triangles and The Triangle Angle Sum Theorem

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Presentation transcript:

Review: Classifying Triangles and The Triangle Angle Sum Theorem

Warm Up Solve the equations for the unknown variable. 1.) 2.) 3.)

Classifying Triangles Two ways to classify: by their sides; by their angles. Sides - Scalene, isosceles, equilateral Angles – Acute, obtuse, right

Examples Name the triangle by it’s sides and angles.

Triangle Angle-Sum Theorem The TAST says that all three angles of any triangle have to add together to equal 180. 40 So, if we are given two of the three angles of a triangle, we can find the third. 90 50

Examples Find the unknown angles. x 60 130 40 60 x

Examples Solve for x. X+22 20 X+58 90 x+30 70