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Exterior Angle Theorem

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Presentation on theme: "Exterior Angle Theorem"— Presentation transcript:

1 Exterior Angle Theorem
Interior Angles Exterior Angles Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

2 The measure of the exterior angle is equal to the sum of two nonadjacent interior angles
(Remote Interior Angles: <1 and <2) 1 m1+m2 =m3 2 3 Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

3 What is this? When do you use it?
Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

4 x = 81° Find the value of x. 43 x 38
Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

5 x = 76° Find the value of x. 72 148 x
Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

6 x = 100° Find the value of x. x 50 50
Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

7 x = 110° Find the value of x. 50 x 60 70
Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

8 Which is larger? 1 or 3? 2 3 1 3 Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

9 Which is larger? 2 or 3? 2 3 1 3 Essential Question: How do the external angles of a triangle relate to the two remote interior angles?

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