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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

Study Guide and Review

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Exercise 12 Page 394

Use the Exterior Angle Theorem.

110 ^(∘)

Practice makes perfect

To find m∠ 2, let's highlight the part involving ∠ 1 and ∠ 2.

We can see that ∠ 2 is exterior to △ ABC. We can find m∠ 2 using the Exterior Angle Theorem and the result from the previous exercise, m∠1= 75^(∘). m∠ 2 = 75^(∘)+35^(∘) ⇒ m∠ 2 = 110^(∘)

Subchapter links

1 Angles of Triangles p.394

2 Congruent Triangles p.394

3 Proving Triangles Congruent-SSS, SAS p.395

4 Proving Triangles Congruent-ASA, AAS p.395

5 Isosceles and Equilateral Triangles p.396

6 Triangles and Coordinate Proof p.396